Adds debug events to the kmx processor and corresponding unit tests.
This corresponds largely to the way that keyman32 emits debug events,
but with one key change: debug events in keyman32 are processed
synchronously, whereas in Keyman Core, the full set of debug events will
be returned alongside the final action list for the key event.

Given this difference, there will likely need to be some more data
returned in individual debug events, specifically around intermediate
context manipulation, as required for step-by-step debugging. However,
that will come in a subsequent PR.

Part of #5013.

Adds all the debug infrastructure:

* public API headers
* public API implementation classes and functions
* basic unit tests
* helper classes for recording debug events
* minimal implementation of kmx-specific debug event signalling --
  just BEGIN and END events.
* tangential: unit test assertion macros and coloured output

chore(windows): make build paths consistent

chore(web): updates regression test-deps to same versions as web

chore(common): npm audit fixes

fix(android/engine): Fix font file path

auto: increment master version to 15.0.81

fix(linux): Don't crash with corrupt keyboard

feat(ios): add spacebar text controls

feat(android): Spacebar text controls

feat(web): spacebar text controls

auto: increment master version to 15.0.80

If we try to install a keyboard that's missing some metadata
we shouldn't crash.

Fixes #5384, #5385.

fix(linux): Improve bitmap conversion

fix(linux): Fix auto-generated help

change(web): fat-finger-performance unit-test threshold

chore(developer): remove obsolete InitClasses

fix(developer): builder and editor commands were ignored

docs: start consolidation of build config docs

More iterations on this yak shave.

Move to all projects using bin/ and obj/ for outputs, and
cleanup all Makefiles and project files accordingly. Remove
some obsolete projects along the way. Cleanup .gitignore
also.

auto: increment master version to 15.0.79