[vscode] Read args from keybindings #9126

[xcariba]

What it does

Reads and stores args from keybindings field from package.json

How to test

Initialize a vscode extension following https://code.visualstudio.com/api/get-started/your-first-extension
Add a shortcut in extension's package.json:

	 "contributes": {
		"keybindings": [
			{
				"command": "type",
				"args": {
                                	 "text": "test"
                                },
				"key": "alt+7",
                                "when": "editorTextFocus"
			}
		]
	}

Install extension.
Open text editor on any file, be shure that cursor is located somewhere in file and fire alt+7 in text editor.
It should insert "test" text on selection.

Review checklist

• as an author, I have thoroughly tested my changes and carefully followed the review guidelines

Reminder for reviewers

• as a reviewer, I agree to behave in accordance with the review guidelines

[RomanNikitenko]

I created a PR to remove the duplicated interface #9374
Please remove this change.

[xcariba]

done!

[RomanNikitenko]

The changes look good to me!

I added the example from the How to test section to my test extension
It works well:

@xcariba
please take a look #9372 (review)

[RomanNikitenko]

I'm going to merge the PR in the evening if there are no objections