refactor: convert monorepo to standalone conduit app

[yamcodes]

Description

This PR converts the Bedstack monorepo into a standalone RealWorld example app for Elysia + Drizzle.

What changed:

• Moved all conduit files from apps/conduit/ to repository root
• Removed the www documentation site (moved to bedstack/bedstack)
• Removed monorepo tooling: turbo.json, bin/fix.js, bedstack.code-workspace
• Updated package.json:
  • Renamed to @bedstack/elysia-drizzle-realworld-example
  • Replaced catalog: references with explicit versions
  • Added direct biome commands for fix/check
  • Removed workspaces configuration
• Simplified GitHub workflows for standalone app operation
• Updated README with new repository URLs and structure
• Updated .all-contributorsrc for the new repository

New repository structure:

/                                                                                                                                                              
├── .github/                                                                                                                                                   
├── bin/                                                                                                                                                       
│   ├── api-tests/                                                                                                                                             
│   └── build.sh                                                                                                                                               
├── drizzle/                                                                                                                                                   
├── src/                                                                                                                                                       
├── .env.example                                                                                                                                               
├── biome.jsonc                                                                                                                                                
├── docker-compose.yml                                                                                                                                         
├── drizzle.config.ts                                                                                                                                          
├── env.config.ts                                                                                                                                              
├── logo.png                                                                                                                                                   
├── package.json                                                                                                                                               
├── tsconfig.json                                                                                                                                              
└── (documentation files)                                                                                                                                      

---

PR Checklist

• Read the Developer's Guide in CONTRIBUTING.md
• Use a concise title to represent the changes introduced in this PR
• Provide a detailed description of the changes introduced in this PR, and, if necessary, some screenshots
• Reference an issue or discussion where the feature or changes have been previously discussed
• Add a failing test that passes with the changes introduced in this PR, or explain why it's not feasible
• Add documentation for the feature or changes introduced in this PR to the docs; you can run them with bun docs

Note: This is a structural refactoring PR. No new tests are needed as existing tests continue to pass. Documentation has been moved to the new