Revert "feat(core): turn @keymanapp/ldml-keyboard-constants into a module 🙀"

feat(core): turn @keymanapp/ldml-keyboard-constants into a module 🙀

Splits the building of keyboardprocessor_ldml.h into a separate
tsconfig.build.json, and designates keyboardprocessor_ldml.ts as a new
Typescript/Node module @keymanapp/ldml-keyboard-constants.

Includes an example usage in the (currently unused) kmx-plus.ts.

Generates a valid .kmx file (legacy structures only) from an
intermediate in-memory structure. Included for completeness, although it
is anticipated that LDML keyboards will not have any groups, though they
will probably have some metadata stores.

Defines kmx binary structures and wireframe builder to emit a .kmx file.

Currently the builder will emit a roughly correct header. Next steps are
to build a .kmx file with stores, groups and keys, to match existing KMX
compiler behaviour. Once that is done, will return to generation of
KMXPlus data structures.

Compiler is designed to work independent of file system so it should run
inside browser or node environment. kmldmlc.ts is node-specific, but all
other modules should be multi-platform.

feat(developer): LDML keyboard compiler - infrastructure 🙀

Co-authored-by: Darcy Wong <darcy_wong@sil.org>
Co-authored-by: Steven R. Loomis <srl295@gmail.com>

chore: merge master into feature-ldml

chore(core): Remove obsolete python keyboardprocessor

Adds basic bundling of kmldmlc to Keyman Developer. Bundling script
built. Yet to come: .wxs integration.

feat(core): augment unit tests for ldml 🙀

feat(core): build out ldml structures / initial scaffolding implementation 🙀

#5015

- add copyright notices

auto: increment master version to 16.0.50

This seems to be not used anywhere and has diverged from the API.

chore(deps): bump @actions/core from 1.8.2 to 1.9.1

fix: remove saving and restoring context kbd options

- quell debug messages unless KMXPLUS_DEBUG=1
- don't read the file twice

#5015

Bumps [@actions/core](https://github.com/actions/toolkit/tree/HEAD/packages/core) from 1.8.2 to 1.9.1.
- [Release notes](https://github.com/actions/toolkit/releases)
- [Changelog](https://github.com/actions/toolkit/blob/main/packages/core/RELEASES.md)
- [Commits](https://github.com/actions/toolkit/commits/HEAD/packages/core

)

---
updated-dependencies:
- dependency-name: "@actions/core"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

- removed null from build, invalid

- also update sample data again

- also update sample data

- beginning of str handling

- checkin spec to repo
- new header: kmx_plus.h with data access structs and functions
- static asserts to validate header sizes
- early validation of data
- internal dump of kmx+ data

- add 001_tiny to the build, annotate with expected run

Remove the saving of context and keyboard options
on the non updateable call to process hook.

The windows Text Input Processor calls twice one call
is not updateable. With the core integeration we run
the processor only once, preserving the actions and
context to be applied on the updatable call.

auto: increment master version to 16.0.49