[Experimental] Trying to https://github.com/r7kamura/vscode-ruby-light

This does not work with many messages as below

```
[Error - 2:47:02 AM] Request textDocument/codeAction failed.
  Message: Request textDocument/codeAction failed with message: Cannot read properties of undefined (reading correctable)
  Code: -32603
```

It looks reported in r7kamura/vscode-ruby-light#30

.vscode/extensions.json

@@ -7,7 +7,7 @@
     "soutaro.steep-vscode",
     "soutaro.rbs-syntax",
     "dprint.dprint",
-    "rebornix.ruby",
+    "r7kamura.vscode-ruby-light",
     "jnoortheen.nix-ide"
   ]
 }

.vscode/settings.json

@@ -1,14 +1,6 @@
 {
   "editor.defaultFormatter": "dprint.dprint",
   "editor.formatOnSave": true,
-  "ruby.useBundler": true,
-  "ruby.useLanguageServer": true,
-  "ruby.lint": {
-    "rubocop": {
-      "useBundler": true
-    }
-  },
-  "ruby.format": "rubocop",
   "cSpell.words": [
     "kwargs",
     "Undocumentable",

CONTRIBUTING.md

@@ -21,16 +21,6 @@ $ bundle install || bundle update
 
 Author is using vscode for development.
 
-### Note - rubocop in vscode
-
-For your information, the rubocop vscode integration shows wrong errors for Rakefile and ruby-ulid.gemspec as below
-
-```text
-The name of this source file (`Rakefile'`) should use snake_case.
-```
-
-`bundle exec rubocop` does not show this messsage. It looks fixed in https://github.com/rubyide/vscode-ruby/pull/647. However it is not released yet at 2022-05-26. (https://github.com/rubyide/vscode-ruby/commit/dc81c809c82003d26af9c4dc7c89fa8f8a26cbf5 "rebornix.ruby" maintainance is inactive now)
-
 ## Touch the development version with REPL
 
 ```console