feat: initial implementation of Depot package manager

- Implement source-based package management with support for archives and Git
- Add multi-system build support (Autotools, CMake, Meson, Rust/Cargo, Custom)
- Implement atomic installation logic using transactions and fakeroot
- Add dependency resolution for build-time and runtime requirements
- Implement package indexing and local repository management
- Add comprehensive configuration system with system/package overrides
- Include Project guidelines (AGENTS.md) and README.md

Cargo.toml

@@ -0,0 +1,43 @@
+[package]
+name = "depot"
+version = "0.1.0"
+edition = "2024"
+
+[lints.rust]
+warnings = "deny"
+
+[dependencies]
+anyhow = "1.0.101"
+ar = "0.9.0"
+bzip2 = "0.6.1"
+clap = { version = "4.5.58", features = ["derive"] }
+flate2 = "1.1.9"
+git2 = "0.20.4"
+indicatif = "0.18.4"
+nix = { version = "0.31.1", features = ["user"] }
+reqwest = { version = "0.13.2", features = ["blocking"] }
+rusqlite = "0.38.0"
+semver = "1.0.27"
+serde = { version = "1.0.228", features = ["derive"] }
+yaml-rust2 = "0.11.0"
+sha2 = "0.10.9"
+tar = "0.4.44"
+tempfile = "3.25.0"
+thiserror = "2.0.18"
+toml = "0.9.8"
+url = "2.5.8"
+walkdir = "2.5.0"
+xz2 = "0.1.7"
+zip = "8.0.0"
+zstd = { version = "0.13.3", features = ["zstdmt"] }
+
+[dev-dependencies]
+tempfile = "3.25.0"
+
+[profile.release]
+opt-level = 3            
+lto = "thin"               
+codegen-units = 1          
+panic = "abort"            
+strip = "symbols"         
+debug = false