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/motion.rs

@@ -9,6 +9,7 @@ use editor::{
 use gpui::{actions, impl_actions, px, ViewContext};
 use language::{CharKind, Point, Selection, SelectionGoal};
 use multi_buffer::MultiBufferRow;
+use schemars::JsonSchema;
 use serde::Deserialize;
 use std::ops::Range;
 use workspace::searchable::Direction;
@@ -139,105 +140,105 @@ pub enum Motion {
     },
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 struct NextWordStart {
     #[serde(default)]
     ignore_punctuation: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 struct NextWordEnd {
     #[serde(default)]
     ignore_punctuation: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 struct PreviousWordStart {
     #[serde(default)]
     ignore_punctuation: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 struct PreviousWordEnd {
     #[serde(default)]
     ignore_punctuation: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub(crate) struct NextSubwordStart {
     #[serde(default)]
     pub(crate) ignore_punctuation: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub(crate) struct NextSubwordEnd {
     #[serde(default)]
     pub(crate) ignore_punctuation: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub(crate) struct PreviousSubwordStart {
     #[serde(default)]
     pub(crate) ignore_punctuation: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub(crate) struct PreviousSubwordEnd {
     #[serde(default)]
     pub(crate) ignore_punctuation: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub(crate) struct Up {
     #[serde(default)]
     pub(crate) display_lines: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub(crate) struct Down {
     #[serde(default)]
     pub(crate) display_lines: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 struct FirstNonWhitespace {
     #[serde(default)]
     display_lines: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 struct EndOfLine {
     #[serde(default)]
     display_lines: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 pub struct StartOfLine {
     #[serde(default)]
     pub(crate) display_lines: bool,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 struct UnmatchedForward {
     #[serde(default)]
     char: char,
 }
 
-#[derive(Clone, Deserialize, PartialEq)]
+#[derive(Clone, Deserialize, JsonSchema, PartialEq)]
 #[serde(rename_all = "camelCase")]
 struct UnmatchedBackward {
     #[serde(default)]