Refactor project module, support per-file tags in tfdoc (#450)

* add support for in-doc tfdoc options overrides

* clean up project module

* add file description tags

* only output module and resource columns in tfdoc file table if they exist

* update fast READMEs

* fix check docs

.github/workflows/linting.yml

@@ -55,12 +55,7 @@ jobs:
       - name: Check documentation (fabric)
         id: documentation-fabric
         run: |
-          python3 tools/check_documentation.py examples modules
-
-      - name: Check documentation (fast)
-        id: documentation-fast
-        run: |
-          python3 tools/check_documentation.py --files --show-extra fast
+          python3 tools/check_documentation.py examples modules fast
 
   # markdown-link-check:
   #   runs-on: ubuntu-latest