ia32/console-vga: fix implicit fallthrough

[lukileczo]

TASK: RTOS-1371

Description

Motivation and Context

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Chore (refactoring, style fixes, git/CI config, submodule management, no code logic changes)

How Has This Been Tested?

• Already covered by automatic testing.
• New test added: (add PR link here).
• Tested by hand on: (list targets here).

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing linter checks and tests passed.
• My changes generate no new compilation warnings for any of the targets.

Special treatment

• This PR needs additional PRs to work (list the PRs, preferably in merge-order).
• I will merge this PR by myself when appropriate.

[gemini-code-assist]

Code Review

This pull request modifies hal/ia32/console-vga.c by adding an explicit /* fallthrough */ comment in the console printing switch-case statement and resetting the escape state halconsole_common.esc to esc_init after processing escape parameters. There are no review comments, so I have no feedback to provide.

[anglov]

Sorry for not catching it while doing the changes – forgot that vga mode in ia32 is not tested on CI :(

[github-actions]

Unit Test Results

10 890 tests  ±0   10 220 ✅ ±0   54m 7s ⏱️ - 1m 42s
   680 suites ±0      670 💤 ±0 
     1 files   ±0        0 ❌ ±0 

Results for commit d9502e8. ± Comparison against base commit ff5e7e9.