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.

src/Scanner/__Tests/StellaOps.Scanner.Analyzers.Lang.Php.Tests/Php/PhpLanguageAnalyzerTests.cs

@@ -0,0 +1,27 @@
+using StellaOps.Scanner.Analyzers.Lang.Php;
+using StellaOps.Scanner.Analyzers.Lang.Tests.Harness;
+using StellaOps.Scanner.Analyzers.Lang.Tests.TestUtilities;
+
+namespace StellaOps.Scanner.Analyzers.Lang.Php.Tests;
+
+public sealed class PhpLanguageAnalyzerTests
+{
+    [Fact]
+    public async Task ComposerLockPackagesAreEmittedAsync()
+    {
+        var cancellationToken = TestContext.Current.CancellationToken;
+        var fixturePath = TestPaths.ResolveFixture("lang", "php", "basic");
+        var goldenPath = Path.Combine(fixturePath, "expected.json");
+
+        var analyzers = new ILanguageAnalyzer[]
+        {
+            new PhpLanguageAnalyzer()
+        };
+
+        await LanguageAnalyzerTestHarness.AssertDeterministicAsync(
+            fixturePath,
+            goldenPath,
+            analyzers,
+            cancellationToken);
+    }
+}