Release v4.3.0

Documentation

• add badge for OpenSSF best practices (26c01c8)
• add CPM as preferred way of managing third party deps (5a33f70)
• add tutorial videos (cb13248)
• fix thumbnail and links of project docs video (1a6269e)
• how to report security vulnerabilities (46426e9)
• improve the key features section (79119ba)
• include build status badges for all branches (2b98ae1)
• revamp the project README (e72c4c3)
• rewrite the contributing section (c7e39c4)
• update instructions for repo from template scenario (1cafdb5)
• update project docs video (c7f79fc)