Bump version to 0.26.5-alpha.0 for pre-release testing

[Copilot]

This PR bumps the package version from 0.26.4 to 0.26.5-alpha.0 using npm version prepatch --preid=alpha to create the next alpha pre-release version.

Changes Made

• Updated package.json version field from 0.26.4 to 0.26.5-alpha.0
• Updated package-lock.json version references to maintain consistency

Validation

• ✅ Only package.json and package-lock.json were modified
• ✅ No changes made to main.js or tsconfig.json as required
• ✅ No dependency upgrades or other modifications
• ✅ All lint and build processes pass successfully
• ✅ Security analysis shows no vulnerabilities introduced

This version bump follows semantic versioning conventions for pre-release alpha versions and prepares the extension for alpha testing of upcoming features.

Original prompt

Run npm version prepatch --preid=alpha to bump the version to the next alpha pre-release version.

Requirements:

• Only modify package.json and package-lock.json files
• Do not change main.js or tsconfig.json files - if any changes were made to these files, revert them
• Do not upgrade any other dependencies
• Fix any build or lint errors that result from the version change
• Make only the necessary changes for the version bump

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