make clippy significantly stricter

Cargo.toml

@@ -9,3 +9,36 @@ edition = "2021"
 logos = "0.13"
 codespan-reporting = "0.11"
 clap = { version = "4.4.8", features = [ "derive" ] }
+
+[lints.rust]
+unsafe_code = "deny"
+variant_size_differences = "warn"
+
+[lints.clippy]
+branches_sharing_code = "warn"
+clone_on_ref_ptr = "warn"
+cognitive_complexity = "warn"
+derive_partial_eq_without_eq = "warn"
+equatable_if_let = "warn"
+filetype_is_file = "warn"
+format_push_string = "warn"
+if_then_some_else_none = "warn"
+integer_division = "warn"
+let_underscore_must_use = "warn"
+manual_clamp = "warn"
+pedantic = "warn"
+str_to_string = "warn"
+unneeded_field_patter = "warn"
+
+allow_attributes_without_reason = "deny"
+cast_lossles = "deny"
+fallible_impl_from = "deny"
+unnecessary_cast = "deny"
+unwrap_used = "deny"
+# allowed, since you can give reasons
+expect_used = "allow"
+
+# must be allowed with clearly documented reasons
+indexing_slicing = "warn"
+arithmetic_side_effects = "warn"
+