fix: configure binary name to keep 'rsp' executable while using 'rsp-cli' crate name

- Add [[bin]] section to Cargo.toml to explicitly name binary as 'rsp'
- Fixes GitHub Actions build that expects 'rsp' executable
- Resolves CI failure: "cp: cannot stat 'target/release/rsp': No such file or directory"

🤖 Generated with [Claude Code](https://claude.ai/code)

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

Author: pomcho555

Cargo.toml

@@ -22,5 +22,9 @@ serde_yaml = "0.9"
 anyhow = "1.0"
 thiserror = "1.0"
 
+[[bin]]
+name = "rsp"
+path = "src/main.rs"
+
 [dev-dependencies]
 tempfile = "3.0"