chore(clippy): enforce coding standards via workspace lints

Cargo.toml

@@ -116,6 +116,9 @@ webbrowser = "1"
 unsafe_code = "deny"
 
 [workspace.lints.clippy]
+cognitive_complexity = "deny"
+too_many_arguments = "deny"
+wildcard_imports = "deny"
 dbg_macro = "warn"
 # VectorCraft never crashes: shipped code returns `Result`/`Option` instead of panicking (see
 # AGENTS.md › Robustness). Tests may unwrap (clippy.toml).

clippy.toml

@@ -3,3 +3,4 @@
 allow-unwrap-in-tests = true
 allow-expect-in-tests = true
 allow-panic-in-tests = true
+cognitive-complexity-threshold = 30