Update all tests to spec.ts, update jest matching, remove unnecessary files

[denislavstanchev]

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[roomote]

Rooviewer   See task on Roo Cloud

Re-review completed. The addition of .spec.js to testMatch addresses the previous feedback. No new issues found.

• Add explicit type annotation for client variable in test/sharing_module.spec.ts

Previous reviews

• 0dc2137: Review #1
• ead77cf: Review #2

_{Mention @roomote in a comment to request specific changes to this pull request or fix all unresolved issues.}