Enhancement request: allow specifying binary/path for formatters

[borring]

Your environment

• vscode-ruby version: 0.28.0
• Ruby version: 3.0.0
• Ruby version manager (if any): NONE
• VS Code version: 1.63.2
• Operating System: Fedora 35 (linux)
• Using language server? (eg useLanguageServer is true in your configuration?) yes

ISSUE

The "ruby.format" only accepts a set of strings or a boolean. Please allow specifying the binary used for formatting.

SOLUTION

Follow the same pattern as Linters, where the config contains an instance of RubyCommandConfiguration
The standard linter follows such a pattern:

get cmd(): string {
	if (this.lintConfig.command) {
		return this.lintConfig.command;
	} else {
		const command = 'standardrb';
		return this.isWindows() ? command + '.bat' : command;
	}
}

The Standard formatter, instead, has the commands hardcoded

get cmd(): string {
	const command = 'standardrb';
	return this.isWindows() ? command + '.bat' : command;
}