Add issue templates.

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -0,0 +1,48 @@
+name: Bug report
+description: Report an issue in kaml
+labels:
+  - is:bug
+body:
+  - type: textarea
+    attributes:
+      label: Describe the bug
+      description: Describe the problem in a few sentences. Please include exact error messages (if any).
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Reproduction repo
+      description: While not required, if you can provide a simple sample project that demonstrates the problem, this makes it much easier to understand and investigate the issue and validate that it has been fixed.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Steps to reproduce
+      description: A clear set of steps that triggers the issue.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Expected behaviour
+      description: A description of what you expected to happen.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Actual behaviour
+      description: A description of what actually happened. Include any error messages and other surrounding output.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Version information
+      description: What version of kaml are you using? (Now is also a good time to double-check you're using the [most recent version](https://github.com/charleskorn/kaml/releases/latest) of kaml.)
+      render: plain text
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Any other information
+      description: Is there anything else we need to know?
+    validations:
+      required: false

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,6 @@
+blank_issues_enabled: false
+
+contact_links:
+  - name: Questions
+    about: Have a question about kaml? Discussions is the best place for that.
+    url: https://github.com/charleskorn/kaml/discussions

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -0,0 +1,29 @@
+name: Feature request
+description: Suggest an idea for kaml
+labels:
+  - is:suggestion
+body:
+  - type: textarea
+    attributes:
+      label: Describe the problem you'd like to solve
+      description: A clear and concise description of what the problem is. For example, [...] is really time consuming and error prone.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Describe the solution you'd like
+      description: A clear and concise description of what you want to happen.
+    validations:
+      required: true
+  - type: textarea
+    attributes:
+      label: Describe alternatives you've considered
+      description: A clear and concise description of any alternative solutions or features you've considered.
+    validations:
+      required: false
+  - type: textarea
+    attributes:
+      label: Additional context
+      description: Add any other context about the feature request here.
+    validations:
+      required: false