Deprecate types in tree

[sonalideshpandemsft]

Add a changeset to deprecate types from @fluidframework/tree. Modify fluid-framework to re-export the non-deprecated APIs from core-interfaces.

Added basic test cases which covers importing a type from the three packages: tree, core-interfaces, and fluid-framework. These tests are added under examples.

Prior PR: #23183

ADO#25440

Copilot reviewed 3 out of 3 changed files in this pull request and generated no suggestions.

Comments skipped due to low confidence (5)

packages/framework/fluid-framework/src/index.ts:57

• [nitpick] The comment explaining the ESLint disable directive is quite long and could be split into multiple lines for better readability.

/* eslint-disable import/export -- The event APIs are known to conflict, and this is intended as the exports via `@fluidframework/core-interfaces` are preferred over the deprecated ones from `@fluidframework/tree`. */

packages/dds/tree/src/index.ts:21

• The type name 'Listeners' is too generic and can cause confusion. Consider renaming it to something more specific like 'EventListeners'.

Listeners,

packages/dds/tree/src/index.ts:25

• The type name 'IsListener' is ambiguous. Consider renaming it to something more descriptive like 'IsEventListener'.

IsListener,

packages/dds/tree/src/index.ts:29

• The type name 'Listenable' is too generic and can cause confusion. Consider renaming it to something more specific like 'EventListenable'.

Listenable,

packages/dds/tree/src/index.ts:33

• The type name 'Off' is too generic and can cause confusion. Consider renaming it to something more specific like 'EventOff'.

Off,

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[jason-ha]

Should be mostly ready with test relocated to examples/utils/import-testing

[github-actions]

🔗 No broken links found! ✅

Your attention to detail is admirable.

linkcheck output

> fluid-framework-docs-site@0.0.0 ci:check-links /home/runner/work/FluidFramework/FluidFramework/docs
> start-server-and-test "npm run serve -- --no-open" 3000 check-links

1: starting server using command "npm run serve -- --no-open"
and when url "[ 'http://127.0.0.1:3000' ]" is responding with HTTP status code 200
running tests using command "npm run check-links"


> fluid-framework-docs-site@0.0.0 serve
> docusaurus serve --no-open

[SUCCESS] Serving "build" directory at: http://localhost:3000/

> fluid-framework-docs-site@0.0.0 check-links
> linkcheck http://localhost:3000 --skip-file skipped-urls.txt

Crawling...

Stats:
  170508 links
    1603 destination URLs
    1842 URLs ignored
       0 warnings
       0 errors