Document supported server settings `initializationOptions`

[aspeddro]

For non vscode users it is not clear how they can configure the server.

rescript-vscode/server/src/server.ts

Lines 29 to 42 in 511a185

	interface extensionConfiguration {
	allowBuiltInFormatter: boolean;
	askToStartBuild: boolean;
	inlayHints: {
	enable: boolean;
	maxLength: number | null;
	};
	codeLens: boolean;
	binaryPath: string | null;
	platformPath: string | null;
	signatureHelp: {
	enabled: boolean;
	};
	}