Change default /docs location to /<pipeline-family>/docs

[cragwolfe]

Currently, FastAPI swagger AKA Open API docs are located under /docs . Instead, it'd be better if they were under /\<pipeline-family>/docs .

Definition of Done

• When generating make generate-test-api , the resulting flask app has the Swagger docs located under /test-project/docs. See https://fastapi.tiangolo.com/tutorial/metadata/#docs-urls for overriding the default /docs location.
• See https://github.com/Unstructured-IO/unstructured-api-tools/blob/246a3e05c579ed08cb95c5e22862ed281315b4a7/unstructured_api_tools/pipelines/api_conventions.py#L60 for constructing the path. One could just use this function and strip the last two parts and add "/docs".
• A Unittest is able to fetch get a 200 response from the new docs location.
• CHANGELOG and version bump