feat(#6669): barcode scanner - Enketo widget and search contact with barcode

[latin-panda]

Description

With the work done in this PR:

• CHWs can scan a barcode into a form field - using the new barcode Enketo widget I created.
• CHWs can search contacts using barcode - a feature I built in 4.4.1 and brought back to this PR for 4.9.0

Use this form: sample-form.zip

See video: Scanning barcode using Android phone - Enketo form and contract search

screen-20241016-214352.mp4

See video: Not supported on non-android devices

Screen.Recording.2024-10-16.at.9.37.42.PM.mov

#6669

Code review checklist

• Readable: Concise, well named, follows the style guide, documented if necessary.
• Documented: Configuration and user documentation on cht-docs
• Tested: Unit and/or e2e where appropriate
• Internationalised: All user facing text
• Backwards compatible: Works with existing data and configuration or includes a migration. Any breaking changes documented in the release notes.

License

The software is provided under AGPL-3.0. Contributions to this project are accepted under the same license.

[latin-panda]

@jkuester, just to keep it in the loop and make it easier to find