feat(cad): integrate standard codec coverage

Render, edit, query, select, and explode newly decoded standard entity variants. Pin acadifc de8d6b5 and preserve None color semantics.

Cargo.toml

@@ -91,7 +91,7 @@ windows-sys = { version = "0.61", features = ["Win32_UI_Shell", "Win32_UI_Window
 
 [patch.crates-io]
 # Track the verified DWG round-trip, I/O, and unified PERF fixes.
-acadrust = { git = "https://github.com/OpenAEC-Foundation/acadifc.git", rev = "8cc4793" }
+acadrust = { git = "https://github.com/OpenAEC-Foundation/acadifc.git", rev = "de8d6b5" }
 
 [target.'cfg(not(target_arch = "wasm32"))'.dependencies]
 # Native enables the plugin host runtime (out-of-process plugins).