Draft: Allow for patterns to exclude files from indexation

Closes https://gitlab.e.foundation/e/documentation/user/-/issues/400

See https://gitlab.e.foundation/e/documentation/user/-/merge_requests/446 for testing

This MR allow any number of regex to be used as exclude patterns to not index some files.

When used at e_docs with docker-compose exec -T bridge_server python main.py /public_html '.*\/devices\/.+\/(?!index).+\.html' we get:

while the live version the pages install are not there:

Note: Since the indexer CLI has changed, the CI of e_docs must also change