docs: Updates for 3.0 and more

[mdodgelooker]

Updates docs for:

• Removed Tree props
• themeCustomizations including brandAnimation and externalLabel
• Other recently-added features

[github-actions[bot]]

Coverage report

Total coverage

Status	Category	Percentage	Covered / Total
🟡	Statements	90.85%	8479/9333
🔴	Branches	80.92%	5119/6326
🟡	Functions	89.13%	2329/2613
🟡	Lines	91.32%	8207/8987

Status of coverage: 🟢 - ok, 🟡 - slightly more than threshold, 🔴 - under the threshold

Report generated by 🧪jest coverage report action from ff7629021ae32c146660defa8fefbadd2a3f8d3c