typescript: Add support for default branches (#2362)

- Fixes #2360



## Checklist

- [x] I have added
[tests](https://www.cursorless.org/docs/contributing/test-case-recorder/)
- [-] I have updated the
[docs](https://github.com/cursorless-dev/cursorless/tree/main/docs) and
[cheatsheet](https://github.com/cursorless-dev/cursorless/tree/main/cursorless-talon/src/cheatsheet)
- [-] I have not broken the cheatsheet

Author: pokey

data/fixtures/scopes/javascript.core/branch.switchCase.scope

@@ -1,19 +1,36 @@
 switch (value) {
   case 0: { }
+  default: { }
 }
 ---
 
-[Content] =
-[Domain] = 1:2-1:13
+[#1 Content] =
+[#1 Domain] = 1:2-1:13
     >-----------<
 1|   case 0: { }
 
-[Removal] = 1:0-1:13
+[#1 Removal] = 1:0-1:13
   >-------------<
 1|   case 0: { }
 
-[Leading delimiter] = 1:0-1:2
+[#1 Leading delimiter] = 1:0-1:2
   >--<
 1|   case 0: { }
 
-[Insertion delimiter] = "\n"
+[#1 Insertion delimiter] = "\n"
+
+
+[#2 Content] =
+[#2 Domain] = 2:2-2:14
+    >------------<
+2|   default: { }
+
+[#2 Removal] = 2:0-2:14
+  >--------------<
+2|   default: { }
+
+[#2 Leading delimiter] = 2:0-2:2
+  >--<
+2|   default: { }
+
+[#2 Insertion delimiter] = "\n"

queries/javascript.core.scm

@@ -567,6 +567,8 @@
   value: (_) @condition
 ) @branch @condition.domain
 
+(switch_default) @branch
+
 ;;!! switch () {}
 ;;!  ^^^^^^^^^^^^
 (switch_statement) @branch.iteration @condition.iteration