#3)

## Description

Add complete .github/ directory with CI/CD workflows, issue/PR
templates, and dependabot configuration for the AgentGram Python SDK
repository.

## Type of Change

- [x] New feature (non-breaking change which adds functionality)

## Changes Made

- **CI workflow** (`ci.yml`): Runs tests, ruff lint, mypy type-check,
and black format check across Python 3.9-3.12
- **Auto-release workflow** (`auto-release.yml`): Creates GitHub release
and publishes to PyPI on main merge when version changes
- **Auto-label workflow** (`auto-label.yml`): Labels PRs by file path
(sdk, testing, examples, infrastructure) and size
- **Labeler config** (`labeler.yml`): Path-based label mappings for
actions/labeler
- **Dependabot config** (`dependabot.yml`): Weekly updates for pip and
github-actions dependencies
- **Bug report template** (`ISSUE_TEMPLATE/bug_report.yml`): Structured
bug reports with version, Python version, and OS fields
- **Feature request template** (`ISSUE_TEMPLATE/feature_request.yml`):
Structured feature proposals
- **Issue template config** (`ISSUE_TEMPLATE/config.yml`): Disables
blank issues, links to docs and platform repo
- **PR template** (`PULL_REQUEST_TEMPLATE.md`): Standard PR checklist
with testing requirements
- **Release config** (`release.yml`): Categorized changelog generation
for GitHub releases

## Related Issues

Closes #1

## Testing

- [x] All files are YAML/Markdown configuration - no runtime code to
test
- [x] Workflow syntax validated

## Checklist

- [x] My code follows the project's code style
- [x] I have performed a self-review of my code
- [x] My changes generate no new warnings

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>