Automate vs code extension deployment

[dakaa16]

When a change is made inside of the vs code extension folder, a new version of the extension will automatically be deployed when a pull request is merged into main. Some further automation would make sure, that the extension is always up to date:

• When Cobol Check has been changed directly, a new Cobol Check distribution, should be built inside the extension. Note that the extension has two config files, which does not contain default configurations.
• The version number for the extension should increment automatically.

This should be done by using the workflows inside the .github folder.

[dakaa16]

We chose to leave out automatic version increment. Otherwise, this is in production now