Fix: Monorepo dependency parsing and docs fetch pipeline integration

- Add automatic detection of package.json in common monorepo patterns (backend/, frontend/, packages/*/, apps/*/,
  services/*/)
  - Fix pipeline deps.json path mismatch - deps writes to .pf/raw/deps.json but docs fetch was looking in
  .pf/deps.json
  - Add _parse_standalone_package_json() to handle subdirectory packages without workspace detection
  - Properly track workspace_package field with relative paths for all discovered package.json files

  Fixes PlantPro and similar monorepos where deps were not being detected (only finding 1 Docker dep instead of 100+
   npm deps)

theauditor/pipelines.py

@@ -363,7 +363,7 @@ def run_full_pipeline(
         ("index", []),
         ("detect-frameworks", []),
         ("deps", ["--check-latest"]),
-        ("docs", ["fetch"]),
+        ("docs", ["fetch", "--deps", "./.pf/raw/deps.json"]),
         ("docs", ["summarize"]),
         ("workset", ["--all"]),
         ("lint", ["--workset"]),