[BCI] QVAC-17058 ci: add empty BCI workflows to enable branch triggering

[sharmaraju352]

Summary

• Add minimal stub workflow files for prebuilds, desktop integration tests, and mobile integration tests
• These must exist on the default branch before push / workflow_call triggers on feature branches will fire
• Full implementations will replace these stubs in QVAC-17063

Files

• .github/workflows/prebuilds-bci-whispercpp.yml (stub)
• .github/workflows/integration-test-bci-whispercpp.yml (stub)
• .github/workflows/integration-mobile-test-bci-whispercpp.yml (stub)

Stacked PR

This is PR 5 of 6 in the BCI addon stack (based on PR 4: #1586):

1. QVAC-17057 - POC with batch transcription ([BCI] QVAC-17057 feat: add bci-whispercpp POC with batch transcription #1583)
2. QVAC-17071 - Update qvac-ext-lib-whisper.cpp ([BCI] QVAC-17071 chore: switch whisper-cpp overlay to tetherto fork #1584)
3. QVAC-17072 - Update qvac-registry-vcpkg ([BCI] QVAC-17072 chore: prepare for registry-based whisper-cpp consumption #1585)
4. QVAC-17062 - Streaming + integration tests ([BCI] QVAC-17062 feat: add streaming transcription and integration tests #1586)
5. QVAC-17058 - Add empty BCI workflows to main (this PR)
6. QVAC-17063 - Add full CI workflows for all platforms

Test plan

• Workflow files are valid YAML
• After merging to main, workflow_dispatch triggers show up in the Actions tab

Made with Cursor

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[github-actions]

This draft PR was closed because it has been stalled for 22 days with no author comment since opening. You can reopen this PR later if it is still necessary.