[v0.1.3] Migrated data processing pipelines from fmcore; various cleanups and fixes

What's Changed

• Migrated data processing pipelines from fmcore to bears by @adivekar-utexas in #6
• Fixed numerous small issues, removed "from typing import *" imports; ran Ruff linter by @adivekar-utexas in #5

Full Changelog: v0.1.2...v0.1.3