refactor: update version handling and remove placeholder injection

- Simplified version display in context menu and template by directly importing version from package.json.
- Removed static version and environment methods from Artplayer class, replacing them with dynamic imports.
- Eliminated placeholder injection logic from build and dev scripts, streamlining the build process.
- Cleaned up build and dev scripts for better readability and maintainability.

packages/artplayer/src/template.js

@@ -1,3 +1,4 @@
+import { version } from '../package.json';
 import { supportsFlex, errorHandle, query, addClass, isMobile, replaceElement } from './utils';
 
 export default class Template {
@@ -57,7 +58,7 @@ export default class Template {
               <div class="art-info-panel">
                 <div class="art-info-item">
                   <div class="art-info-title">Player version:</div>
-                  <div class="art-info-content">${'__APP_VERSION__'}</div>
+                  <div class="art-info-content">${version}</div>
                 </div>
                 <div class="art-info-item">
                   <div class="art-info-title">Video url:</div>