* Add new option to disable/enable jsdoc autocompletion

* Refactor JsDocCompletionItem

- remove internal command
- move TS service call and template generation to CompletionItem
- only call TS service if JSDoc completion is enabled in settings
- add local config and config update method to CompletionProvider

* Change how and when JsDocCompletionHelper is registered

Register JsDocCompletionHelper and update configuration in registerProviders instead of activate. Also react to configuration change.

* Rename JsDocCompletionHelper to JsDocCompletionProvider

* Add missing newline at the eof

* Restore completion prompt for JSDoc autocomplete

Restores internal command but but as a separate class. Registers command on extension activation.

Fixes #9743

Pause fancy blinking after 10 blinks

Fixes #23261

Check for string not truthy

Fixed typo in terminal.contribution description

April changes

Don't run `install --force` on Appveyor. This causes errors to be ignored and we don't do it on Travis or the official build.