Get bootmagic working with shared sn32f24xb matrix

[karliss]

Description

Fix bootmagic lite when using sn32f24xb shared rgb/key matrix driver.

Bootmagic lite gets checked as early as possible -> after key matrix has been initialized but before other optional subystems like RGB are running. Even if bootmagic check happened after rgb is initialized the actual scanning code runs at it's own pace based on timer interrupts, which makes it's usage during early init somewhat problematic. As a result bootmagic_lite doesn't work probably for most sonix keyboards using shared matrix and the corresponding driver.

This PR adds single manual key only scan to ensure there is meaningful data when the default bootmagic implementation reads it.

Types of Changes

• [ ] Core
• [x] Bugfix
• [ ] New feature
• [x] Enhancement/optimization
• [ ] Keyboard (addition or update)
• [ ] Keymap/layout/userspace (addition or update)
• [ ] Documentation

Checklist

• [x] My code follows the code style of this project: C, Python
• [x] I have read the PR Checklist document and have made the appropriate changes.
• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have read the CONTRIBUTING document.
• [ ] I have added tests to cover my changes.
• [x] I have tested the changes and verified that they work and don't break anything (as well as I can manage).

[karliss]

Currently keeping as draft as I want to test it compiles with all the relevant sonix boards currently in sn32_develop.

[karliss]

Tested:

• that it works in combination with #355 but with custom boot magic removed
• compiles with all the keyboards in sn32_develop that have `"driver": "sn32f24xb", (while doing noticed unrelated issue in one of keychron configs, but that's for separate PR)

[github-actions[bot]]

Thank you for your contribution! This pull request has been automatically marked as stale because it has not had activity in the last 45 days. It will be closed in 30 days if no further activity occurs. Please feel free to give a status update now, or re-open when it's ready. For maintainers: Please label with bug, awaiting review, breaking_change, in progress, or on hold to prevent the issue from being re-flagged.

[github-actions[bot]]

Thank you for your contribution! This pull request has been automatically closed because it has not had activity in the last 30 days. Please feel free to give a status update now, ping for review, or re-open when it's ready. // [stale-action-closed]