Hierarchical refactorings (#41975)

* add hierarchical refactoring strings

* fourslash tests

* extractSymbol filters returned actions

* move refactorKind check to utilities

* rename parameters

* messaging for addOrRemoveBracesToArrowFunction

* fix up inferFunctionReturnType

* fix up convertArrowFunctionOrFunctionExpression

* add preferences to fourslash method

* fix up convert string

* fix up moveToNewFile

* fix lint errors

* remove extra arrow braces diagnostics

* break out tests

* add refactor helpers

* refactor refactors

* keep list of actions

* address PR comments

* response protocol

* address more comments

src/compiler/diagnosticMessages.json

@@ -6143,6 +6143,34 @@
         "category": "Message",
         "code": 95148
     },
+    "Return type must be inferred from a function": {
+        "category": "Message",
+        "code": 95149
+    },
+    "Could not determine function return type": {
+        "category": "Message",
+        "code": 95150
+    },
+    "Could not convert to arrow function": {
+        "category": "Message",
+        "code": 95151
+    },
+    "Could not convert to named function": {
+        "category": "Message",
+        "code": 95152
+    },
+    "Could not convert to anonymous function": {
+        "category": "Message",
+        "code": 95153
+    },
+    "Can only convert string concatenation": {
+        "category": "Message",
+        "code": 95154
+    },
+    "Selection is not a valid statement or statements": {
+        "category": "Message",
+        "code": 95155
+    },
 
     "No value exists in scope for the shorthand property '{0}'. Either declare one or provide an initializer.": {
         "category": "Error",