chore: release 3.0.0

[rokt-releases]

Release 3.0.0

These files should have changed during the release, if they didn't then this is likely an issue and should be investigated:

• package.json
• CHANGELOG.md

Added

• Support Shoppable ads and v9 of mParticle iOS SDK (#311)

Changed

• Add --allow-same-version to draft release workflow (#312)

[cursor]

PR Summary

Low Risk
Docs/versioning-only changes (no runtime code changes), so the main risk is an incorrect version or release notes/links.

Overview
Cuts the 3.0.0 release by bumping VERSION from 2.9.2 to 3.0.0.

Updates CHANGELOG.md with a new 3.0.0 section (Shoppable ads + mParticle iOS SDK v9 support, plus a release-workflow tweak) and adjusts the compare links for Unreleased and the new 3.0.0 tag.

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