- k_100, k_101, k_102 all fail for different reasons.
comments in the files

For: #7401

feat(common): kvks writer for TypeScript 🙀

fix(developer): kmc was overwriting kmx with kvk 🙀

Also splits attributes from sub-elements in kvks-file in order to make
round-trip writing more pleasant.

Adds new round-trip test for kvks writer.

Removes incorrect property keybitmap, adds missing property layout.

feat(developer): visual keyboard compiler for LDML 🙀

refactor(developer): split file type management into package 🙀

refactor(developer): move compiler callbacks out of readers 🙀

feat(developer): kvk support 🙀

Adds support for building .kvk files to kmc. At present, .kvk will
always be generated, even if the .xml does not have a hardware layer.

Adds visual-keyboard-compiler and corresponding e2e test.

Splits file format reading, writing, and in-memory structures of .kmx,
.kvk, .kvks, .xml (ldml keyboard) into separate common module. Lots of
little fixups, sorry...

This will make it much easier for us to reuse these readers and writers
in future code.

Now has a shared object for all tests, reset between tests, and if the
test fails, prints any reported compiler messages.

Also updates kvk and kvks tests with refactored names from previous
commit.

Also minor tweaks around reading .xml files.

Part of #7238.

Supports reading and writing .kvk files, and reading .kvks files,
to/from an in-memory VisualKeyboard object.

TODO:
 - Full validation of .kvks files
 - Writing .kvks files
 - Some cleanup of API surfaces for consistency

feat(developer): fixes to kmc-package for keyboard support 🙀

chore: merge master into feature-ldml 🙀

chore(core): ignore checksum in 16.0 🙀

Mocha with ts-register was failing with an error for Keyman Developer
Server.

```
Error: Debug Failure. False expression: Non-string value passed to
`ts.resolveTypeReferenceDirective`, likely by a wrapping package working
with an outdated `resolveTypeReferenceDirectives` signature. This is
probably not a problem in TS itself.
```

The `^4.5.4` version reference for typescript was too lax, and so npm
gave us typescript 4.8.3, which was the latest version in use in the
repo in this branch (in kmc-model). This is also why the build only
failed on this branch -- on master branch, the latest version referenced
was still 4.5.4.

Changing to `~4.5.4` ensures that it stayed on the 4.5.x series, and
mocha then ran version 4.5.5 of tsc.

This is something we should resolve when we move the entire repo to tsc
4.8+. Currently we are still on 4.5.

Note: it may be sensible to review all versioning for typescript,
because the minor version changes are causing functionality breaks,
which kinda violates the spirit of semver ("MINOR version when you add
functionality in a backwards compatible manner"). We can be more
restrictive by updating all package.json references to typescript to
`~4.5.4` instead of the current `^4.5.4` in use throughout. If/when we
do this, we will need to check our ts-node references also.

* xml2js, `emptyTag` property: https://github.com/DefinitelyTyped/DefinitelyTyped/pull/59259
* semver `parse` `includePrerelease` property: https://github.com/DefinitelyTyped/DefinitelyTyped/pull/61586#discussion_r939877412
* commander use needed to be declared for hextobin

chore(common): builder extra params support 🏗 🍒

feat(common): builder trap-functionality testing 🏗️

refactor(common): `builder` script tweaks - "has action" vs "start action" 🏗️

refactor(common/web): reworks low-level module build scripts 🏗️

kmc-package had a number of gaps and errors. This fixes a bunch of
problems:

* Wrong case on XML elements
* Wrong metadata in system element
* Missing kmp.json in Files array (needs test in consumer apps later)
* Missing displayFont, oskFont in keyboard elements
* Including copyLocation when == 0
* Including an empty startMenu element
* Incorrect assumptions about location of source files in source/ folder

Note that support for followKeyboardVersion will come later; for now, it
uses the possibly-stale value from the Keyboard element in the .kps
file.