📝 [docs] Update SDK documentation

docs/99-candella-sdk.md

@@ -11,7 +11,7 @@ pip install candella-sdk
 ```
 
 !!! warning
-    The Candella is in a pre-release state and isn't available in PyPI yet. You will need to build the project from source to use the SDK.
+    The Candella SDK is in a pre-release state. Features, methods, and APIs may change over time.
 
 ## Build the SDK from source
 
@@ -31,11 +31,51 @@ Then, use `pip install` and point to the resulting wheel file in the `dist` dire
 
 ## Creating projects
 
-Currently, the Candella SDK lets you create three different kinds of projects: applications, core services, and frameworks. To create any of these projects, run `candella-sdk --create` and specify the `--type` argument:
+Currently, the Candella SDK lets you create three different kinds of projects: applications, core services, and frameworks. To create any of these projects, run `candella-sdk --action create` and specify the `--type` argument:
 
-- `--type application` to create an application.
+- `--type app` to create an application.
 - `--type service` to create a core service.
 - `--type framework` to create a framework.
 
 !!! note
-    If you choose an open-source license, you will need to supply the LICENSE file with your app. This may be updated in a future release of the SDK.
+    If you choose an open-source license, you will need to supply the LICENSE file with your app. This may be updated in a future release of the SDK.
+
+## Validating projects
+
+The Candella SDK provides a rudimentary validation system for projects to ensure that apps, core services, and frameworks have proper manifests and the materials needed for the project to run in Candella.
+
+To start validating a project, run `candella-sdk --action validate` and specify the `--project` argument with the path to your project.
+
+Currently, the SDK will check for the following:
+
+- That the project is a valid Candella project
+- That the project contains a manifest file
+- That the project's manifest file contains the required keys and doesn't include invalid keys
+- That the project contains the proper iconset if the project is an app or core service
+
+!!! warning "About project validation"
+    Remember that project validation is not a substitution for thorough testing, nor does it guarantee that your project will work correctly with Candella.
+
+    Always remember to thoroughly test your projects and how they work in the most recent versions of Candella alongside the most recent versions of the frameworks and core services included.
+
+## Using Candella SDK programmatically
+
+The Candella SDK can be imported as a Python module into a script to automate development or to write tests for validating apps.
+
+Creating a project can be performed by calling `sdk.create` with a single argument that defines the project type:
+
+```py
+from candella_sdk import sdk, CandellaProjectType
+
+sdk.create(CandellaProjectType.application)
+```
+
+Likewise, a project can be validated programmatically by calling `sdk.validate` and passing in the path to the project to validate. The validation function returns a tuple containing if the project was validated, and the error in question if the validation failed.
+
+```py
+from candella_sdk import sdk
+
+validated, error = sdk.validate("path/to/Example.aosapp")
+if not validated:
+    raise Exception(error)
+```