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/vim/src/vim.rs

@@ -49,25 +49,25 @@ use workspace::{self, Pane, ResizeIntent, Workspace};
 use crate::state::ReplayableAction;
 
 /// Used to resize the current pane
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 pub struct ResizePane(pub ResizeIntent);
 
 /// An Action to Switch between modes
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 pub struct SwitchMode(pub Mode);
 
 /// PushOperator is used to put vim into a "minor" mode,
 /// where it's waiting for a specific next set of keystrokes.
 /// For example 'd' needs a motion to complete.
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 pub struct PushOperator(pub Operator);
 
 /// Number is used to manage vim's count. Pushing a digit
-/// multiplis the current value by 10 and adds the digit.
-#[derive(Clone, Deserialize, PartialEq)]
+/// multiplies the current value by 10 and adds the digit.
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 struct Number(usize);
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 struct SelectRegister(String);
 
 actions!(