feat: add PhpManagerService to handle PHP version discovery, installation tracking, and extension management

src/main/services/PhpManagerService.ts

@@ -191,7 +191,6 @@ export class PhpManagerService {
             const content = fs.readFileSync(iniPath, 'utf8')
             const lines = content.split(/\r?\n/)
             const essentialExts = ['openssl', 'curl', 'mbstring', 'fileinfo', 'zip', 'gd', 'pdo_mysql', 'mysqli']
-            let changed = false
 
             for (const ext of extensions) {
                 // Check if already enabled
@@ -202,7 +201,6 @@ export class PhpManagerService {
                 if (!ext.enabled && essentialExts.includes(ext.name.toLowerCase())) {
                     await this.toggleExtension(version, ext.name, true)
                     ext.enabled = true
-                    changed = true
                 }
             }
         }