Add configuration options for third-party formatters (#2092)

* Add more formatters

* Update vscode/package.json

Co-authored-by: Vinicius Stock <vinistock@users.noreply.github.com>

* Update vscode/package.json

Co-authored-by: Vinicius Stock <vinistock@users.noreply.github.com>

* PR Feedback

---------

Co-authored-by: Andy Waite <andyw8@users.noreply.github.com>
Co-authored-by: Vinicius Stock <vinistock@users.noreply.github.com>

vscode/package.json

@@ -285,8 +285,18 @@
             "auto",
             "rubocop",
             "syntax_tree",
+            "standard",
+            "rubyfmt",
             "none"
           ],
+          "enumDescriptions": [
+            "Automatically detect formatter",
+            "RuboCop",
+            "Syntax Tree",
+            "Standard (supported by community addon)",
+            "Rubyfmt (supported by community addon)",
+            "Do not use a formatter"
+          ],
           "default": "auto"
         },
         "rubyLsp.linters": {