Auto mouse layer support

Hightlight

• Auto mouse layer support
• Show pressing keys (max 6 keys, shown at top right corner)
• Brush up contents in OLED
• Remove most of RGBLIGHT effects from via firmwares for size

What's Changed

• keyball44記載の注意書きを39/61にも追記 by @gs1068 in #365
• fix: typo in buildguide_jp.md for Keyball44 by @momocus in #371
• merge and refine: print pressing keys by @koron in #506
• Print (up to 3) pressing keys on OLED by @ryo33 in #439
• Asymmetric scroll amount depending on direction by @koron in #507
• Fix asymmetric behavior of scroll direction by @MiSawa in #443
• enable auto mouse layer by @koron in #508
• Implementing AutoMouseLayer Feature in Keyball Firmware by @tokuhirom in #454
• change QMK version in docs to 0.22.14 by @koron in #515
• upgrade artifact actions to v4 by @koron in #516

New Contributors

• @gs1068 made their first contribution in #365
• @momocus made their first contribution in #371
• @ryo33 made their first contribution in #439
• @tokuhirom made their first contribution in #454

Full Changelog: v1.2.0...v1.3.0