Add inputs support for the php-src branch

Author: Ayesh

action.yml

@@ -1,5 +1,10 @@
 name: Compile and install PHP from source
 description: Compile and install PHP from source
+inputs:
+  branch:
+    default: ''
+    description: >
+      php-src branch
 runs:
   using: composite
   steps:
@@ -8,6 +13,7 @@ runs:
       with:
         repository: php/php-src
         path: .php-src
+        ref: ${{ inputs.branch }}
 
     - name: Install dependencies
       shell: bash