feat: migrate to ESM and update dependencies (#949)

* feat: migrate to ESM and update dependencies

- Migrated the project to ESM to support the latest `@actions/*` package versions.
- Updated dependencies to their latest versions, including `@actions/core`, `@actions/github`, and others.
- Replaced `.prettierrc.js` with `.prettierrc.json` for configuration.
- Updated ESLint configuration to use ESM and added new rules.
- Refactored test files to use `jest` with ESM imports.
- Removed deprecated files and updated import paths to use `.js` extensions.
- Added new files for improved configuration and removed unnecessary mocks.
- Updated README to reflect breaking changes in version 7.

* docs: update README to clarify ESM migration details and adjust TypeScript configuration

src/api/get-changed-files.ts

@@ -1,6 +1,6 @@
 import * as core from '@actions/core';
 import * as github from '@actions/github';
-import {ClientType} from './types';
+import {ClientType} from './types.js';
 
 export const getChangedFiles = async (
   client: ClientType,

src/api/get-changed-pull-requests.ts

@@ -1,7 +1,7 @@
 import * as core from '@actions/core';
 import * as github from '@actions/github';
-import {getChangedFiles} from './get-changed-files';
-import {ClientType} from './types';
+import {getChangedFiles} from './get-changed-files.js';
+import {ClientType} from './types.js';
 
 export async function* getPullRequests(
   client: ClientType,

src/api/get-content.ts

@@ -1,5 +1,5 @@
 import * as github from '@actions/github';
-import {ClientType} from './types';
+import {ClientType} from './types.js';
 
 export const getContent = async (
   client: ClientType,

src/api/get-label-configs.ts

@@ -1,15 +1,15 @@
 import * as core from '@actions/core';
 import * as yaml from 'js-yaml';
 import fs from 'fs';
-import {ClientType} from './types';
-import {getContent} from './get-content';
+import {ClientType} from './types.js';
+import {getContent} from './get-content.js';
 
 import {
   ChangedFilesMatchConfig,
   toChangedFilesMatchConfig
-} from '../changedFiles';
+} from '../changedFiles.js';
 
-import {toBranchMatchConfig, BranchMatchConfig} from '../branch';
+import {toBranchMatchConfig, BranchMatchConfig} from '../branch.js';
 
 export interface MatchConfig {
   all?: BaseMatchConfig[];

src/api/index.ts

@@ -1,6 +1,6 @@
-export * from './get-changed-files';
-export * from './get-changed-pull-requests';
-export * from './get-content';
-export * from './get-label-configs';
-export * from './set-labels';
-export * from './types';
+export * from './get-changed-files.js';
+export * from './get-changed-pull-requests.js';
+export * from './get-content.js';
+export * from './get-label-configs.js';
+export * from './set-labels.js';
+export * from './types.js';

src/api/set-labels.ts

@@ -1,5 +1,5 @@
 import * as github from '@actions/github';
-import {ClientType} from './types';
+import {ClientType} from './types.js';
 
 export const setLabels = async (
   client: ClientType,