Initial commit: C3 (Cached Content Conduit)

A minimal CDN for serving versioned, gzip-compressed static assets,
backed by SQLite and an actor-based (smarm) storage server, with
HTTP serving via urus.

- CLI: create/add/archive packages and versions, serve over HTTP
- Storage: SQLite-backed asset store (src/store.rs) with gzip
  compression on ingest and content-type sniffing by extension
- HTTP: GET /packages (list packages+versions), GET
  /assets/:package/:version/:filename (serves gzip or transparently
  decompressed, with immutable long-lived cache headers)

Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "CCC"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+urus = { git = "https://git.kalsbeek.dev/Markk116/urus.git" }
+# Pinned to the same tag urus itself depends on, so Cargo unifies both
+# into a single source id/copy of smarm (avoids duplicate #[global_allocator]).
+smarm = { git = "https://git.kalsbeek.dev/Markk116/smarm.git", tag = "v0.5.0" }
+rusqlite = { version = "0.31", features = ["bundled"] }
+flate2 = "1.0"
+serde = { version = "1", features = ["derive"] }
+serde_json = "1"