Add PHP Analyzer Plugin and Composer Lock Data Handling

- Implemented the PhpAnalyzerPlugin to analyze PHP projects.
- Created ComposerLockData class to represent data from composer.lock files.
- Developed ComposerLockReader to load and parse composer.lock files asynchronously.
- Introduced ComposerPackage class to encapsulate package details.
- Added PhpPackage class to represent PHP packages with metadata and evidence.
- Implemented PhpPackageCollector to gather packages from ComposerLockData.
- Created PhpLanguageAnalyzer to perform analysis and emit results.
- Added capability signals for known PHP frameworks and CMS.
- Developed unit tests for the PHP language analyzer and its components.
- Included sample composer.lock and expected output for testing.
- Updated project files for the new PHP analyzer library and tests.

plugins/scanner/analyzers/lang/StellaOps.Scanner.Analyzers.Lang.Php/manifest.json

@@ -0,0 +1,22 @@
+{
+  "schemaVersion": "1.0",
+  "id": "stellaops.analyzer.lang.php",
+  "displayName": "StellaOps PHP Analyzer",
+  "version": "0.1.0",
+  "requiresRestart": true,
+  "entryPoint": {
+    "type": "dotnet",
+    "assembly": "StellaOps.Scanner.Analyzers.Lang.Php.dll",
+    "typeName": "StellaOps.Scanner.Analyzers.Lang.Php.PhpAnalyzerPlugin"
+  },
+  "capabilities": [
+    "language-analyzer",
+    "php",
+    "composer"
+  ],
+  "metadata": {
+    "org.stellaops.analyzer.language": "php",
+    "org.stellaops.analyzer.kind": "language",
+    "org.stellaops.restart.required": "true"
+  }
+}