Decouple indentSize and tabSize if needed

if indentSize is set to "tabSize" in config, and we try to set tabSize,
we will inadvertantly set indentSize as well. so decouple them in this
case.

and remove the hack that was here for this problem.

src/api.ts

@@ -1,12 +1,5 @@
 import * as editorconfig from 'editorconfig'
-import {
-	TextDocument,
-	TextEditorOptions,
-	Uri,
-	window,
-	workspace,
-	commands,
-} from 'vscode'
+import { TextDocument, TextEditorOptions, Uri, window, workspace } from 'vscode'
 
 /**
  * Resolves `TextEditorOptions` for a `TextDocument`, combining the editor's
@@ -58,7 +51,14 @@ export async function applyTextEditorOptions(
 		return
 	}
 
-	commands.executeCommand('editor.action.detectIndentation') // <--- HACK!!
+	const workspaceConfig = workspace.getConfiguration('editor', editor?.document)
+	if (
+		workspaceConfig.get<number | string>('indentSize') === 'tabSize' &&
+		typeof newOptions.indentSize === 'undefined' &&
+		typeof newOptions.tabSize === 'number'
+	) {
+		newOptions.indentSize = editor.options.indentSize
+	}
 	editor.options = newOptions
 
 	if (onSuccess) {