chore: initial repo setup with README, LICENSE, and contributor docs

- README with hero section, quick start, HTML schema example, package overview, and Remotion comparison
- MIT LICENSE (copyright HeyGen)
- CONTRIBUTING.md with dev setup, commit conventions, and project structure
- GitHub issue templates (bug report, feature request) and PR template
- .gitignore for Node.js/TypeScript projects

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,34 @@
+---
+name: Bug Report
+about: Report a bug to help us improve
+title: ""
+labels: bug
+assignees: ""
+---
+
+## Describe the bug
+
+A clear description of what the bug is.
+
+## To reproduce
+
+Steps to reproduce the behavior:
+
+1. ...
+2. ...
+3. ...
+
+## Expected behavior
+
+What you expected to happen.
+
+## Environment
+
+- OS: [e.g., macOS 15, Ubuntu 24.04, Windows 11]
+- Node.js version: [e.g., 22.x]
+- FFmpeg version: [e.g., 7.x]
+- Hyperframes version: [e.g., 0.1.0]
+
+## Additional context
+
+Any other context, screenshots, or error logs.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,23 @@
+---
+name: Feature Request
+about: Suggest an idea for Hyperframes
+title: ""
+labels: enhancement
+assignees: ""
+---
+
+## Problem
+
+What problem does this solve? What's the use case?
+
+## Proposed solution
+
+How should it work?
+
+## Alternatives considered
+
+Any alternative approaches you've thought about.
+
+## Additional context
+
+Any other context, mockups, or examples.

.github/pull_request_template.md

@@ -0,0 +1,19 @@
+## What
+
+Brief description of the change.
+
+## Why
+
+Why is this change needed?
+
+## How
+
+How was this implemented? Any notable design decisions?
+
+## Test plan
+
+How was this tested?
+
+- [ ] Unit tests added/updated
+- [ ] Manual testing performed
+- [ ] Documentation updated (if applicable)