Add #[allow(...)] directives to macro-generated entries

This patch adds `#[allow(non_camel_case_types)]` and
`#[allow(non_upper_case_globals)]` directives to generated `const`s and
`struct`s.

While `cargo check` by default ignores naming style inconsistencies in
macro-produced code, `rust-analyzer` seems to be using a more strict mode.
So annotation of generated entries allows to prevent the display of such
warnings by the language server.

Author: mivort

godot-macros/src/class/derive_godot_class.rs

@@ -142,6 +142,7 @@ pub fn derive_godot_class(item: venial::Item) -> ParseResult<TokenStream> {
     let funcs_collection_struct_name = format_funcs_collection_struct(class_name);
     let funcs_collection_struct = quote! {
         #[doc(hidden)]
+        #[allow(non_camel_case_types)]
         pub struct #funcs_collection_struct_name {}
     };
 

godot-macros/src/derive/derive_from_godot.rs

@@ -75,6 +75,7 @@ fn make_fromgodot_for_int_enum(
                 #(
                     // Interesting: using let instead of const would introduce a runtime bug. Its values cannot be used in match lhs (binding).
                     // However, bindings silently shadow variables, so the first match arm always runs; no warning in generated proc-macro code.
+                    #[allow(non_upper_case_globals)]
                     const #ord_variables: #int = #discriminants;
                 )*