refactor: consolidate binaries into unified sbuild CLI with subcommands

- Merge 4 separate binaries (sbuild, sbuild-cache, sbuild-meta, sbuild-linter) into single sbuild binary
- Add subcommands: build, info, cache, lint, meta
- Implement timeout enforcement in exec() to prevent hanging builds
- Clean up temp build script file after execution
- Fix -p short option conflict in lint command (pkgver now uses -P)

Author: QaidVoid

Cargo.lock

@@ -9,18 +9,13 @@ repository = "https://github.com/pkgforge/sbuilder"
 keywords = ["soar", "sbuild", "cache", "sqlite", "build-history"]
 
 [dependencies]
-clap = { version = "4", features = ["derive"] }
 rusqlite = { version = "0.36", features = ["bundled"] }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 chrono = { version = "0.4", features = ["serde"] }
 thiserror = "2"
 tracing = "0.1"
 
-[[bin]]
-name = "sbuild-cache"
-path = "src/main.rs"
-
 [lib]
 name = "sbuild_cache"
 path = "src/lib.rs"