feat: complete migration of Devlog from Go to Rust

- Implemented core types and models with Serde support.
- Developed a circular buffer system using Tokio channels.
- Created an adapter trait system and ported the Claude adapter.
- Established an adapter registry for managing different adapters.
- Integrated a file system watcher using the `notify` crate.
- Ported historical sync logic for backfill operations.
- Developed CLI commands using `clap` for user interaction.
- Added comprehensive tests and performance benchmarks.

Author: Marvin Zhang

.gitignore

@@ -11,6 +11,12 @@ bin/
 # Go test binary
 *.test
 
+# =========================
+# Rust Build Artifacts
+# =========================
+rust/target/
+**/*.rs.bk
+
 # Go coverage
 coverage.txt
 coverage.html