[FEAT] Add issue templates for common report/requests.

.github/ISSUE_TEMPLATE/a_bug_report.yaml

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+name: Bug Report
+description: Report a problem with the cookiecutter template or the generated project.
+title: '[BUG] '
+labels: [bug]
+body:
+-   type: textarea
+    id: description
+    attributes:
+        label: Description
+        description: Describe the bug clearly and concisely.
+        placeholder: What happened?
+    validations:
+        required: true
+
+-   type: textarea
+    id: reproduce
+    attributes:
+        label: Steps to Reproduce
+        description: Provide all steps, including Cookiecutter prompts.
+        placeholder: |
+            1.
+            2.
+            3.
+    validations:
+        required: true
+
+-   type: textarea
+    id: expected
+    attributes:
+        label: Expected Behavior
+        description: Describe what you expected to happen.
+    validations:
+        required: true
+
+-   type: textarea
+    id: actual
+    attributes:
+        label: Actual Behavior / Logs
+        description: Include error messages, stack traces, or relevant output.
+        render: shell
+
+-   type: input
+    id: environment
+    attributes:
+        label: Environment
+        description: Python version, OS, Cookiecutter version.
+        placeholder: Python 3.12.1, Ubuntu 22.04, Cookiecutter 2.3

.github/ISSUE_TEMPLATE/b_feature_request.yaml

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+name: Feature Request
+description: Suggest an improvement for the Cookiecutter template.
+title: "[Feature] "
+labels: [enhancement]
+body:
+  - type: textarea
+    id: summary
+    attributes:
+      label: Summary
+      description: Describe the feature you propose.
+      placeholder: What should be added or improved?
+    validations:
+      required: true
+
+  - type: textarea
+    id: benefits
+    attributes:
+      label: Rationale
+      description: Why is this feature valuable? How will users benefit?
+    validations:
+      required: true
+
+  - type: textarea
+    id: design
+    attributes:
+      label: Proposed Design
+      description: Describe how the feature could be implemented. Include template variables, folder layout changes, etc.
+
+  - type: textarea
+    id: compatibility
+    attributes:
+      label: Backward Compatibility
+      description: Could this change break existing generated projects?
+
+  - type: textarea
+    id: alternatives
+    attributes:
+      label: Alternatives
+      description: Are there other solutions or approaches?

.github/ISSUE_TEMPLATE/c_cookiecutter_request.yaml

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+name: Cookiecutter Option Request
+description: Propose a new Cookiecutter variable or configuration option.
+title: "[Option] "
+labels: [enhancement, cookiecutter]
+body:
+  - type: input
+    id: option_name
+    attributes:
+      label: Option Name
+      placeholder: e.g., enable_fastapi
+    validations:
+      required: true
+
+  - type: textarea
+    id: purpose
+    attributes:
+      label: Purpose
+      description: Why should this option exist?
+
+  - type: textarea
+    id: default
+    attributes:
+      label: Default Value
+      placeholder: "true / false / string"
+
+  - type: textarea
+    id: impact
+    attributes:
+      label: Impact on Template
+      description: What directories, files, or hooks would be affected?
+
+  - type: textarea
+    id: implementation
+    attributes:
+      label: Suggested Implementation
+      description: Optional but helpful.

.github/ISSUE_TEMPLATE/d_documentation.yaml

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+name: Documentation Improvement
+description: Suggest updates to the README or the generated project docs.
+title: "[Docs] "
+labels: [documentation]
+body:
+  - type: textarea
+    id: scope
+    attributes:
+      label: Topic
+      description: What documentation needs improvement?
+
+  - type: textarea
+    id: problem
+    attributes:
+      label: Problem
+      description: What is unclear, inaccurate, or missing?
+
+  - type: textarea
+    id: solution
+    attributes:
+      label: Proposed Improvement
+      description: How should the documentation be improved?
+
+  - type: textarea
+    id: references
+    attributes:
+      label: References
+      description: Add links or examples if applicable.

.github/ISSUE_TEMPLATE/e_ux_feddback.yaml

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+name: Template UX Feedback
+description: Provide feedback on usability and user experience of the template.
+title: "[UX] "
+labels: [feedback]
+body:
+  - type: textarea
+    id: experience
+    attributes:
+      label: User Experience
+      description: Describe your experience generating a project.
+
+  - type: textarea
+    id: prompts
+    attributes:
+      label: Cookiecutter Prompts
+      description: Were the prompts intuitive and clear?
+
+  - type: textarea
+    id: pain_points
+    attributes:
+      label: Pain Points
+      description: What felt confusing, unnecessary, or complicated?
+
+  - type: textarea
+    id: suggestions
+    attributes:
+      label: Suggestions
+      description: How can we improve the template experience?