feat(ui, dom-adapters): delegated beforeinput

[neSpecc]

1. Blocks holder element (Host) is now contenteditable
2. Host dispatches 'ui:before-input' event
3. BlockToolAdapter subscribed to 'ui:before-input' and delegates it to attached inputs

[github-actions]

⏭️ No files to mutate for ./packages/model

[github-actions]

Coverage report for ./packages/dom-adapters

St.❔	Category	Percentage	Covered / Total
🟢	Statements	100%	0/0
🟢	Branches	100%	0/0
🟢	Functions	100%	0/0
🟢	Lines	100%	0/0

Test suite run success

1 tests passing in 1 suite.

Report generated by 🧪jest coverage report action from 2682125

[github-actions]

Coverage report for ./packages/model

St.❔	Category	Percentage	Covered / Total
🟢	Statements	99.76%	818/820
🟢	Branches	98.65%	220/223
🟢	Functions	98.51%	199/202
🟢	Lines	99.75%	787/789

Test suite run success

421 tests passing in 25 suites.

Report generated by 🧪jest coverage report action from 2682125

[github-actions]

Coverage report for ./packages/ot-server

St.❔	Category	Percentage	Covered / Total
🟡	Statements	70.97%	22/31
🔴	Branches	20%	1/5
🟡	Functions	75%	6/8
🟡	Lines	68.97%	20/29

Test suite run success

4 tests passing in 1 suite.

Report generated by 🧪jest coverage report action from 2682125

[github-actions]

Coverage report for ./packages/collaboration-manager

St.❔	Category	Percentage	Covered / Total
🟡	Statements	67.51%	160/237
🟢	Branches	80%	60/75
🔴	Functions	57.14%	20/35
🟡	Lines	67.52%	158/234

Test suite run success

67 tests passing in 4 suites.

Report generated by 🧪jest coverage report action from 2682125

[github-actions]

⏭️ No files to mutate for ./packages/dom-adapters