Add unit tests for VexLens normalizer, CPE parser, product mapper, and PURL parser

- Implemented comprehensive tests for VexLensNormalizer including format detection and normalization scenarios.
- Added tests for CpeParser covering CPE 2.3 and 2.2 formats, invalid inputs, and canonical key generation.
- Created tests for ProductMapper to validate parsing and matching logic across different strictness levels.
- Developed tests for PurlParser to ensure correct parsing of various PURL formats and validation of identifiers.
- Introduced stubs for Monaco editor and worker to facilitate testing in the web application.
- Updated project file for the test project to include necessary dependencies.

deploy/downloads/manifest.json

@@ -0,0 +1,18 @@
+{
+  "version": "2025.09.2-mock",
+  "generatedAt": "2025-12-06T00:00:00Z",
+  "items": [
+    {
+      "name": "console-web",
+      "type": "container",
+      "image": "registry.stella-ops.org/stellaops/web-ui@sha256:3878c335df50ca958907849b09d43ce397900d32fc7a417c0bf76742e1217ba1",
+      "channel": "dev-mock"
+    },
+    {
+      "name": "console-bundle",
+      "type": "archive",
+      "url": "https://downloads.stella-ops.mock/console/2025.09.2-mock/console.tar.gz",
+      "sha256": "12dd89e012b1262ac61188ac5b7721ddab80c4e2b6341251d03925eb49a48521"
+    }
+  ]
+}