Add queries that filter based on change detection (#42)

Rebase of #30.
Resolves #23.

Adds support for trait queries that filter based on change detection.

Co-authored-by: Brian Merchant <[email protected]>

Author: joseph-gio

proc-macro/src/lib.rs

@@ -114,7 +114,7 @@ fn impl_trait_query(arg: TokenStream, item: TokenStream) -> Result<TokenStream2>
 
     let my_crate = proc_macro_crate::crate_name("bevy-trait-query").unwrap();
     let my_crate = match my_crate {
-        proc_macro_crate::FoundCrate::Itself => quote! { crate },
+        proc_macro_crate::FoundCrate::Itself => quote! { bevy_trait_query },
         proc_macro_crate::FoundCrate::Name(x) => {
             let ident = quote::format_ident!("{x}");
             quote! { #ident }
@@ -156,7 +156,7 @@ fn impl_trait_query(arg: TokenStream, item: TokenStream) -> Result<TokenStream2>
         #where_clause
         {
             type Item<'__w> = #my_crate::ReadTraits<'__w, #trait_object>;
-            type Fetch<'__w> = #my_crate::ReadAllTraitsFetch<'__w, #trait_object>;
+            type Fetch<'__w> = <#my_crate::All<&'__a #trait_object> as #imports::WorldQuery>::Fetch<'__w>;
             type ReadOnly = Self;
             type State = #my_crate::TraitQueryState<#trait_object>;
 
@@ -264,7 +264,7 @@ fn impl_trait_query(arg: TokenStream, item: TokenStream) -> Result<TokenStream2>
         #where_clause
         {
             type Item<'__w> = #my_crate::WriteTraits<'__w, #trait_object>;
-            type Fetch<'__w> = #my_crate::WriteAllTraitsFetch<'__w, #trait_object>;
+            type Fetch<'__w> = <#my_crate::All<&'__a #trait_object> as #imports::WorldQuery>::Fetch<'__w>;
             type ReadOnly = &'__a #trait_object;
             type State = #my_crate::TraitQueryState<#trait_object>;