Improve keymap json schema (#23044)

Also:

* Adds `impl_internal_actions!` for deriving the `Action` trait without
registering.

* Removes some deserializers that immediately fail in favor of
`#[serde(skip)]` on fields where they were used. This also omits them
from the schema.

Release Notes:

- Keymap settings file now has more JSON schema information to inform
`json-language-server` completions and info, particularly for actions
that take input.

crates/gpui_macros/src/register_action.rs

@@ -29,12 +29,13 @@ pub(crate) fn register_action(type_name: &Ident) -> proc_macro2::TokenStream {
             fn __autogenerated() {
                 /// This is an auto generated function, do not use.
                 #[doc(hidden)]
-                fn #action_builder_fn_name() -> gpui::ActionData {
-                    gpui::ActionData {
+                fn #action_builder_fn_name() -> gpui::MacroActionData {
+                    gpui::MacroActionData {
                         name: <#type_name as gpui::Action>::debug_name(),
                         aliases: <#type_name as gpui::Action>::deprecated_aliases(),
                         type_id: ::std::any::TypeId::of::<#type_name>(),
                         build: <#type_name as gpui::Action>::build,
+                        json_schema: <#type_name as gpui::Action>::action_json_schema,
                     }
                 }
                 #[doc(hidden)]