Co-authored-by: Marc Durdin <marc@durdin.net>

- also update test case, 002_null_invalid is expected to not validate

#7097

chore(core): update 000_null_keyboard to be a proper null keyboard 🙀

- also update test case

#7097

- rewrite 000_null_keyboard.kmx to be valid, but with no keys
- remove outdated comment in kmx_plus.h
- update kmx_plus.cpp to not reverse the order of section ids (#7098)
- add a new test option for expected-error

fix(core): fixes for kmx_file rearrangement 🙀

fix breaks in #7111 and prior

- try stdint.h instead of cstdint

#7098

fix breaks in #7111 and prior

#7098

chore: merge master into feature-ldml

fix(core): ldml: remove 0-length arrays 🙀

feat(common): add parameter variable support to `builder_` functions

#7098

feat(developer): LDML keyboard compiler - infrastructure 🙀

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

fix(windows): Add invalidate context action to non-updatable parse

chore: Change platform advocates per discussion

fix(android): verify browser before starting activity

#7098

- update builder to print out string as well as hex
- change to symbol name

auto: increment master version to 16.0.51

chore: merge master into feature-ldml

- need a pragma to suppress this on MSVC

#7098

chore(core): Remove obsolete python keyboardprocessor

- per review comments

Fixes: #7098

Fixes: #7098

- use 32 bit hex constants instead

#7098

- use C99 flexible array member instead

#7098

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