feat: Initialize Rust project with dependencies and tooling

Set up the GitLab Inbox (gi) CLI tool as a Rust 2024 edition project.

Dependencies organized by purpose:
- Database: rusqlite (bundled SQLite), sqlite-vec for vector search
- Serialization: serde/serde_json for GitLab API responses
- CLI: clap for argument parsing, dialoguer for interactive prompts,
  comfy-table for formatted output, indicatif for progress bars
- HTTP: reqwest with tokio async runtime for GitLab API calls
- Async: async-stream and futures for paginated API iteration
- Utilities: thiserror for error types, chrono for timestamps,
  flate2 for payload compression, sha2 for content hashing
- Logging: tracing with env-filter for structured debug output

Release profile optimized for small binary size (LTO, strip symbols).

Project structure follows standard Rust conventions with src/lib.rs
exposing modules and src/main.rs as CLI entry point.

Added .gitignore for Rust/Cargo artifacts and local database files.
Added AGENTS.md with TDD workflow guidance and beads issue tracking
integration instructions for AI-assisted development.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,46 @@
+# Dependencies
+node_modules/
+
+# Build output
+dist/
+
+# Test coverage
+coverage/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+*~
+
+# OS files
+.DS_Store
+Thumbs.db
+
+# Environment
+.env
+.env.local
+.env.*.local
+
+# Logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Local config files
+gi.config.json
+
+# beads
+.bv/
+
+# SQLite databases (local development)
+*.db
+*.db-wal
+*.db-shm
+
+
+# Added by cargo
+
+/target