feat(tree): Include list of properties that changed in nodeChanged event

[CraigMacomber]

Description

Updated version of #22043 .

See changeset for details.

Reviewer Guidance

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[CraigMacomber]

A usability issue with this APi has been reported:

Lack of strong typing of the keys least to string names for keys in code easily getting out of date (or having typos) with no compile errors.

There are two ways this could be improved:

• strong types on the keys in the set (ex: derive them from the object node or nodes provided)
• a way to refer to property key strings that is strongly typed to the object they are on and refactors properly. For example Foo.fields.bar.key possible leveraging a "FieldSchemaContextual" subclass which has the key as s strongly typed property.

[CraigMacomber]

A usability issue with this APi has been reported:

Lack of strong typing of the keys least to string names for keys in code easily getting out of date (or having typos) with no compile errors.

There are two ways this could be improved:

• strong types on the keys in the set (ex: derive them from the object node or nodes provided)
• a way to refer to property key strings that is strongly typed to the object they are on and refactors properly. For example Foo.fields.bar.key possible leveraging a "FieldSchemaContextual" subclass which has the key as s strongly typed property.

Fixed. Also moved API to beta incase there are more such issues.

[github-actions]

🔗 No broken links found! ✅

Your attention to detail is admirable.

linkcheck output

> [email protected] ci:linkcheck /home/runner/work/FluidFramework/FluidFramework/docs
> start-server-and-test ci:start 1313 linkcheck:full

1: starting server using command "npm run ci:start"
and when url "[ 'http://127.0.0.1:1313' ]" is responding with HTTP status code 200
running tests using command "npm run linkcheck:full"


> [email protected] ci:start
> http-server ./public --port 1313 --silent


> [email protected] linkcheck:full
> npm run linkcheck:fast -- --external


> [email protected] linkcheck:fast
> linkcheck http://localhost:1313 --skip-file skipped-urls.txt --external

Crawling...

Stats:
  378023 links
    2980 destination URLs
       2 URLs ignored
       0 warnings
       0 errors