20230709.0.0

Changes

📝 Documentation

• Docs (readme): Add notes about possibly needing same virtualbox minor version on host @leojonathanoh (#46)
• Docs (readme): Add more details to usage @leojonathanoh (#47)
• Docs (readme): Add info about packer configuation via environment variables @leojonathanoh (#48)
• Docs (examples): Use 2 cpu and 1024M of memory in ubuntu2004-virtualbox example @leojonathanoh (#45)
• Docs (examples): Move examples to docs/examples @leojonathanoh (#43)
• Docs (examples): Improve readability of usage one-liners @leojonathanoh (#44)