setup: prepare for pypi upload
rename README as README.md add build/ and dist/ to gitignore
related to swh-environment#1242 (closed)
Test Plan
https://test.pypi.org/project/swh-indexer/
Migrated from D484 (view on Phabricator)
rename README as README.md add build/ and dist/ to gitignore
related to swh-environment#1242 (closed)
https://test.pypi.org/project/swh-indexer/
Migrated from D484 (view on Phabricator)