feat: GIA-72 add Pull Request and Issue templates

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+description: Report a bug or issue in the codebase.
+title: "[BUG] "
+labels: ["bug", "triage"]
+assignees: ""
+---
+
+## Description
+
+Provide a clear description of the bug.
+
+## Steps to Reproduce
+
+1. Actions performed...
+2. Click on...
+3. See error...
+
+## Expected Behavior
+
+What should have happened.
+
+## Additional Context
+
+Add any other context, logs, or screenshots.

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+description: Propose a new feature or improvement.
+title: "[FEAT] "
+labels: ["enhancement"]
+assignees: ""
+---
+
+## Problem Statement
+
+Is your feature request related to a problem? Please describe.
+
+## Proposed Solution
+
+A clear description of what you want to happen.
+
+## Alternative Solutions
+
+Describe any alternatives you have considered.
+
+## Additional Context
+
+Add any other context or mockups.

.github/pull_request_template.md

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+# Pull Request
+
+## Description
+
+[Provide a concise summary of the changes introduced by this pull request]
+
+## Related Issues
+
+[Specify related issue keys, e.g., GIA-XX]
+
+## Changes
+
+- [File/Component]: [Schematic summary of changes]
+
+## Verification and Review Guidance
+
+1. Checkout the branch: `git checkout <branch-name>`
+2. Test commands: [e.g., `uvx pre-commit run --all-files`]
+3. Areas to inspect: [Specify files, logics, or edge cases to review]