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/Findings/__Tests/StellaOps.Findings.Ledger.Tests/InlinePolicyEvaluationServiceTests.cs

@@ -36,6 +36,11 @@ public sealed class InlinePolicyEvaluationServiceTests
             "policy-sha",
             "affected",
             7.1m,
+            null,
+            null,
+            null,
+            null,
+            1,
             new JsonObject { ["deprecated"] = "true" },
             Guid.NewGuid(),
             null,
@@ -68,6 +73,11 @@ public sealed class InlinePolicyEvaluationServiceTests
             "policy-sha",
             "accepted_risk",
             3.4m,
+            null,
+            null,
+            null,
+            null,
+            1,
             new JsonObject { ["runtime"] = "contained" },
             Guid.NewGuid(),
             "explain://existing",