Avoid shipping development files

There are a lot of files that shouldn't be included in the source
distribution package as they are for development purposes only.

Signed-off-by: Leandro Lucarella <[email protected]>

Author: llucax

MANIFEST.in

@@ -1,8 +1,15 @@
+exclude .cookiecutter-replay.json
+exclude .darglint
+exclude .editorconfig
 exclude .gitignore
 exclude .gitmodules
 exclude CODEOWNERS
+exclude CONTRIBUTING.md
+exclude mkdocs.yml
 exclude noxfile.py
+exclude src/conftest.py
 recursive-exclude .github *
+recursive-exclude docs *
 recursive-exclude pytests *
-recursive-include submodules/api-common-protos/google *.proto
-recursive-include submodules/frequenz-api-common/proto *.proto
+recursive-include py *.pyi
+recursive-include submodules *.proto