chore: bump renderer package versions to alpha.3

[jacobsimionato]

Description of Changes

This pull request increments the versions of the core A2UI renderer packages and their dependencies to the next alpha release (alpha.3).

The following packages have been updated:

• @a2ui/angular: 0.9.0-alpha.1 -> 0.9.0-alpha.3
• @a2ui/lit: 0.9.2-alpha.1 -> 0.9.2-alpha.3
• @a2ui/markdown-it: 0.0.2 -> 0.0.2-alpha.3
• @a2ui/react: 0.9.0-alpha.1 -> 0.9.0-alpha.3
• @a2ui/web_core: 0.9.1-alpha.1 -> 0.9.1-alpha.3

Corresponding package-lock.json files in samples/ and tools/ have been updated to reflect these version changes.

Rationale

These changes synchronize the versions of the various renderers and core libraries within the monorepo, preparing for the next phase of testing and integration.

Testing/Running Instructions

Reviewers can verify the version updates by checking the package.json files in the renderers/ directory.
To verify that the workspace remains consistent, run:

npm install

in the root or relevant subdirectories to ensure dependencies resolve correctly with the new versions.

[gemini-code-assist]

Code Review

This pull request updates the versions of several packages across the repository, including @a2ui/angular, @a2ui/lit, @a2ui/react, @a2ui/web_core, and @a2ui/markdown-it, along with their corresponding lockfiles in samples and tools. The review feedback identifies critical version mismatches where package-lock.json files were updated to alpha.2 while the source package.json files were bumped to alpha.3. Additionally, some dependency and peer dependency versions in sample lockfiles were found to be inconsistent with the new alpha releases.

[ditman]

Nothing changed no this package since the last publish, there was no need to publish this under alpha.3 :P