Add Kakao BMS support to SOLAPI PHP SDK

- Introduced new BMS message types including TEXT, IMAGE, WIDE, WIDE_ITEM_LIST, COMMERCE, CAROUSEL_FEED, CAROUSEL_COMMERCE, and PREMIUM_VIDEO.
- Added models for BMS components such as BmsButton, BmsCarousel, BmsCommerce, and BmsVideo.
- Implemented validation logic for BMS message requirements.
- Created example scripts for sending various BMS message types.
- Updated composer.json to include PHPUnit for testing and added autoloading for development.
- Enhanced .gitignore to exclude PHPUnit cache files and vendor directory.
- Added unit tests for BMS models and validation logic.

Author: Palbahngmiyine

.gitignore

@@ -11,4 +11,8 @@ debug/
 
 # Composer gitignore
 composer.phar
-/vendor/
+/vendor/
+
+# PHPUnit
+.phpunit.result.cache
+.phpunit.cache/

composer.json

@@ -9,6 +9,11 @@
       "Nurigo\\Solapi\\": "src/"
     }
   },
+  "autoload-dev": {
+    "psr-4": {
+      "Nurigo\\Solapi\\Tests\\": "tests/"
+    }
+  },
   "repositories": [
     {
       "type": "vcs",
@@ -45,5 +50,11 @@
     "psr/http-client": "^1.0",
     "psr/http-message": "^1.0 || ^2.0",
     "nyholm/psr7": "^1.5"
+  },
+  "require-dev": {
+    "phpunit/phpunit": "^9.5"
+  },
+  "scripts": {
+    "test": "phpunit"
   }
 }