chore: add project scaffolding, docs, UI components, and env examples

GitHub templates, community docs, .env.example files, setup script,
home UI components, billing hook, and cache constants.

Author: iamjr15

.github/ISSUE_TEMPLATE/bug_report.md

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+---
+name: Bug Report
+about: Report a bug to help us improve Cheatcode
+title: "[Bug] "
+labels: bug
+assignees: ''
+---
+
+## Description
+
+A clear and concise description of what the bug is.
+
+## Steps to Reproduce
+
+1. Go to '...'
+2. Click on '...'
+3. See error
+
+## Expected Behavior
+
+What you expected to happen.
+
+## Actual Behavior
+
+What actually happened. Include error messages, stack traces, or screenshots if applicable.
+
+## Environment
+
+- **OS:** (e.g., macOS 15.2, Ubuntu 24.04, Windows 11 + WSL2)
+- **Browser:** (e.g., Chrome 130, Firefox 133)
+- **Docker version:** (run `docker --version`)
+- **Node.js version:** (run `node --version`)
+- **Python version:** (run `python --version`)
+- **Deployment:** (Docker Compose / local dev / cloud)
+
+## Logs
+
+<details>
+<summary>Relevant logs</summary>
+
+```
+Paste backend logs (`docker compose logs api`), frontend console errors, or worker logs here.
+```
+
+</details>
+
+## Additional Context
+
+Any other context about the problem (screenshots, related issues, etc.).

.github/ISSUE_TEMPLATE/config.yml

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+blank_issues_enabled: true
+contact_links:
+  - name: Security Vulnerability
+    url: mailto:founders@trycheatcode.com
+    about: "Do not open a public issue for security vulnerabilities. Email us instead."
+  - name: Questions & Discussions
+    url: https://github.com/cheatcode-ai/cheatcode/discussions
+    about: "Ask questions or start a discussion here."

.github/ISSUE_TEMPLATE/feature_request.md

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+---
+name: Feature Request
+about: Suggest an idea for Cheatcode
+title: "[Feature] "
+labels: enhancement
+assignees: ''
+---
+
+## Problem
+
+A clear description of the problem this feature would solve. Example: "I'm frustrated when..."
+
+## Proposed Solution
+
+Describe the solution you'd like. Be as specific as possible about the expected behavior.
+
+## Alternatives Considered
+
+Any alternative solutions or features you've considered.
+
+## Additional Context
+
+Add any other context, mockups, screenshots, or examples from similar projects.

.github/PULL_REQUEST_TEMPLATE.md

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+## Summary
+
+Brief description of what this PR does and why.
+
+## Changes
+
+-
+
+## Testing
+
+How you tested these changes. Include steps to reproduce if relevant.
+
+## Screenshots
+
+If there are UI changes, include before/after screenshots.
+
+## Checklist
+
+- [ ] My branch is up to date with `main`
+- [ ] I've tested my changes locally
+- [ ] Linting passes (`make check`)
+- [ ] I've added/updated tests for new functionality
+- [ ] I've updated documentation if needed
+- [ ] My changes don't introduce security vulnerabilities

CODE_OF_CONDUCT.md

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+# Code of Conduct
+
+## Our Commitment
+
+We are committed to providing a welcoming, inclusive, and harassment-free experience for everyone who participates in the Cheatcode project, regardless of age, body size, disability, ethnicity, gender identity and expression, level of experience, nationality, personal appearance, race, religion, sexual identity, or sexual orientation.
+
+## Expected Behavior
+
+- Be respectful and considerate in all interactions
+- Welcome newcomers and help them get started
+- Give and accept constructive feedback graciously
+- Focus on what is best for the community and the project
+- Show empathy and kindness toward other community members
+- Use inclusive language
+
+## Unacceptable Behavior
+
+- Harassment, intimidation, or discrimination in any form
+- Trolling, insulting or derogatory comments, and personal or political attacks
+- Public or private harassment
+- Publishing others' private information without explicit permission
+- Sexual language, imagery, or unwelcome advances
+- Any conduct that would reasonably be considered inappropriate in a professional setting
+
+## Scope
+
+This Code of Conduct applies to all project spaces, including GitHub repositories, issues, pull requests, discussions, and any other communication channels associated with Cheatcode. It also applies when an individual is officially representing the project in public spaces.
+
+## Enforcement
+
+Instances of unacceptable behavior may be reported by contacting the project team at **[founders@trycheatcode.com](mailto:founders@trycheatcode.com)**. All complaints will be reviewed and investigated promptly and fairly.
+
+The project team is obligated to maintain the confidentiality of the reporter. Enforcement actions may include:
+
+1. **Warning** -- A private written warning with clarity about the violation and expected behavior going forward
+2. **Temporary Ban** -- A temporary ban from any interaction or public communication with the project
+3. **Permanent Ban** -- A permanent ban from any interaction or public communication with the project
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant](https://www.contributor-covenant.org/), version 2.1.