refactor: convert CI config validator to TS

src/ci_config_validator.js → src/ci_config_validator.ts

-const vscode = require('vscode');
-const { gitExtensionWrapper } = require('./git/git_extension_wrapper');
-const gitLabService = require('./gitlab_service');
+import * as vscode from 'vscode';
+import { gitExtensionWrapper } from './git/git_extension_wrapper';
+import * as gitLabService from './gitlab_service';
 
 const { showInformationMessage, showErrorMessage } = vscode.window;
 
-async function validate() {
+export async function validate(): Promise<void> {
   const editor = vscode.window.activeTextEditor;
 
   if (!editor) {
-    showInformationMessage('GitLab Workflow: No open file.');
+    await showInformationMessage('GitLab Workflow: No open file.');
     return;
   }
 
   const content = editor.document.getText();
   const response = await gitLabService.validateCIConfig(
-    gitExtensionWrapper.getActiveRepository().rootFsPath,
+    gitExtensionWrapper.getActiveRepository()!.rootFsPath,
     content,
   );
 
   if (!response) {
-    showInformationMessage('GitLab Workflow: Failed to validate CI configuration.');
+    await showInformationMessage('GitLab Workflow: Failed to validate CI configuration.');
     return;
   }
 
   const { status, errors, error } = response;
 
   if (status === 'valid') {
-    showInformationMessage('GitLab Workflow: Your CI configuration is valid.');
+    await showInformationMessage('GitLab Workflow: Your CI configuration is valid.');
   } else if (status === 'invalid') {
     if (errors[0]) {
-      showErrorMessage(errors[0]);
+      await showErrorMessage(errors[0]);
     }
 
-    showErrorMessage('GitLab Workflow: Invalid CI configuration.');
+    await showErrorMessage('GitLab Workflow: Invalid CI configuration.');
   } else if (error) {
-    showErrorMessage(`GitLab Workflow: Failed to validate CI configuration. Reason: ${error}`);
+    await showErrorMessage(
+      `GitLab Workflow: Failed to validate CI configuration. Reason: ${error}`,
+    );
   }
 }
-
-exports.validate = validate;