ci: build android apk using artifact-based formplayer assets

[Bahati308]

ci(formulus-android): merge formplayer assets into android workflow

Description

• Merge the separate Formplayer assets workflow into the Formulus Android workflow as two dependent jobs.
• Build Formplayer assets in a dedicated build-formplayer-assets job and pass them to the Android build via an artifact.
• Remove the old update-formplayer-assets workflow and stop committing built assets to the repo.
• Ignore formplayer_dist in .gitignore so built assets are no longer tracked in git.

Type of Change

• Bug Fix
• New Feature / Enhancement
• Refactor / Code Cleanup
• Documentation Update
• Maintenance / Chore
• Other (please specify): CI/CD workflow restructuring

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Component(s) Affected

• formulus (React Native mobile app)
• formulus-formplayer (React web app)
• synkronus (Go backend server)
• synkronus-cli (Command-line utility)
• Documentation
• DevOps / CI/CD
• Other:

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Related Issue(s)

Closes/Fixes/Resolves: N/A

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Testing

• Unit tests added/updated
• Integration tests added/updated
• Manually tested
• Tested on multiple platforms (if applicable)
• Not applicable

Manual verification: workflow YAML passes syntax/structure checks and job dependencies are correctly configured.

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Breaking Changes

• This PR introduces breaking changes
• This PR does NOT introduce breaking changes

If breaking changes, please describe migration steps:

N/A

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Documentation Updates

• Documentation has been updated
• Documentation update is not required

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Checklist

• Code follows project style guidelines
• All existing tests pass
• New tests added for new functionality
• PR title follows Conventional Commits format

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Thank you for contributing to Open Data Ensemble (ODE)!

[najuna-brian]

Thanks @Bahati308
This simplifies the CI/CD setup, removes auto-commit complexity, and uses artifacts appropriately.
The consolidation makes the workflow easier to maintain and understand.

[najuna-brian]

Thanks for the docs update