docs(all): added README.md and LICENSE files

LICENSE

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+MIT License
+
+Copyright (c) 2024 Vladislav Shepilov
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+<h1 align="center" style="vertical-align: middle;">
+  <img src="./docs/img/logo.svg" width="30"> <strong>FastHealthcheck</strong>
+</h1>
+
+<b>Framework agnostic health checks with integrations for most popular ASGI frameworks: [FastAPI](https://github.com/fastapi/fastapi) / [Faststream](https://github.com/airtai/faststream) / [Litestar](https://github.com/litestar-org/litestar) to help you to implement the [Health Check API](https://microservices.io/patterns/observability/health-check-api.html) pattern</b>
+
+---
+
+<p align="center">
+
+  <a href="https://github.com/shepilov-vladislav/fast-healthchecks/actions/workflows/1_test.yml" target="_blank">
+    <img src="https://github.com/shepilov-vladislav/fast-healthchecks/actions/workflows/1_test.yml/badge.svg?branch=main" alt="Test Passing"/>
+  </a>
+
+  <a href="https://codecov.io/gh/shepilov-vladislav/fast-healthchecks" target="_blank">
+    <img src="https://codecov.io/gh/shepilov-vladislav/fast-healthchecks/branch/main/graph/badge.svg?token=ddDOL8qZLp" alt="Coverage"/>
+  </a>
+
+  <a href="https://www.pepy.tech/projects/fast-healthchecks" target="_blank">
+    <img src="https://static.pepy.tech/personalized-badge/fast-healthchecks?period=month&units=international_system&left_color=grey&right_color=green&left_text=downloads/month" alt="Downloads"/>
+  </a>
+
+  <a href="https://pypi.org/project/fast-healthchecks" target="_blank">
+    <img src="https://img.shields.io/pypi/v/fast-healthchecks?label=PyPI" alt="Package version"/>
+  </a>
+
+  <a href="https://pypi.org/project/fast-healthchecks" target="_blank">
+    <img src="https://img.shields.io/pypi/pyversions/fast-healthchecks.svg" alt="Supported Python versions"/>
+  </a>
+
+  <a href="https://github.com/airtai/fast-healthchecks/blob/main/LICENSE" target="_blank">
+    <img src="https://img.shields.io/github/license/airtai/fast-healthchecks.png" alt="License"/>
+  </a>
+
+<p>
+
+---
+
+## Installation
+
+With `pip`:
+```bash
+pip install fast-healthcheck
+```
+
+With `poetry`:
+```bash
+poetry add fast-healthcheck
+```
+
+With `uv`:
+```bash
+uv add fast-healthcheck
+```
+
+## Quick Start
+
+Examples:
+- [FastAPI example](./examples/fastapi_example)
+- [Faststream example](./examples/faststream_example)
+- [Litestar example](./examples/litestar_example)
+
+```python
+import asyncio
+import os
+import time
+
+from fastapi import FastAPI
+
+from fast_healthchecks.checks.function import FunctionHealthCheck
+from fast_healthchecks.checks.kafka import KafkaHealthCheck
+from fast_healthchecks.checks.mongo import MongoHealthCheck
+from fast_healthchecks.checks.postgresql.asyncpg import PostgreSQLAsyncPGHealthCheck
+from fast_healthchecks.checks.postgresql.psycopg import PostgreSQLPsycopgHealthCheck
+from fast_healthchecks.checks.rabbitmq import RabbitMQHealthCheck
+from fast_healthchecks.checks.redis import RedisHealthCheck
+from fast_healthchecks.checks.url import UrlHealthCheck
+from fast_healthchecks.integrations.fastapi import HealthcheckRouter, Probe
+
+
+def sync_dummy_check() -> bool:
+    time.sleep(0.1)
+    return True
+
+
+async def async_dummy_check() -> bool:
+    await asyncio.sleep(0.1)
+    return True
+
+
+app = FastAPI()
+app.include_router(
+    HealthcheckRouter(
+        Probe(
+            name="liveness",
+            checks=[
+                FunctionHealthCheck(func=sync_dummy_check, name="Sync dummy"),
+            ],
+        ),
+        Probe(
+            name="readiness",
+            checks=[
+                KafkaHealthCheck(
+                    bootstrap_servers=os.environ["KAFKA_BOOTSTRAP_SERVERS"],
+                    name="Kafka",
+                ),
+                MongoHealthCheck.from_dsn(os.environ["MONGO_DSN"], name="Mongo"),
+                PostgreSQLAsyncPGHealthCheck.from_dsn(os.environ["POSTGRES_DSN"], name="PostgreSQL asyncpg"),
+                PostgreSQLPsycopgHealthCheck.from_dsn(os.environ["POSTGRES_DSN"], name="PostgreSQL psycopg"),
+                RabbitMQHealthCheck.from_dsn(os.environ["RABBITMQ_DSN"], name="RabbitMQ"),
+                RedisHealthCheck.from_dsn(os.environ["REDIS_DSN"], name="Redis"),
+                UrlHealthCheck(url="https://httpbin.org/status/200", name="URL 200"),
+            ],
+        ),
+        Probe(
+            name="startup",
+            checks=[
+                FunctionHealthCheck(func=async_dummy_check, name="Async dummy"),
+            ],
+        ),
+        debug=True,
+        prefix="/health",
+    ),
+)
+```
+
+## Development
+
+### Setup environment
+
+```bash
+git clone https://github.com/shepilov-vladislav/fast-healthchecks.git
+cd fast-healthchecks
+uv sync --group=dev --group=docs --all-extras
+```
+
+### Run linters
+
+```bash
+make lint
+```
+
+### Run all tests
+
+```bash
+make tests-all
+```
+
+### Serve documentation
+
+```bash
+make serve-docs
+```
+
+## License
+
+This project is licensed under the terms of the MIT license.