chore(linux): Add `clean` target to `rules`

auto: increment master version to 17.0.171

This allows to completely cleanup after a package build. Also fixes
`keyman-config/build.sh` to do a better job with clean.

Fixes #9518.

docs(linux): Explicitly specify emscripten version

fix(common): builder_parse broke on option parameters

auto: increment master version to 17.0.170

emscripten 3.1.44 works, but 3.1.45 fails, so this change modifies
the documentation to explicitly request `3.1.44` instead of `latest`.

fix(linux): Fix exception in km-kvk2ldml

auto: increment master version to 17.0.169

This change fixes an exception that occurs if the user specifies
an outputfile in a non-existing directory. Also catch several other
related exceptions.

Fixes #9522.

refactor(linux): Fix warning

Follow-up of #4999 (which mentions different warnings). This
change fixes other warnings that we were still getting.

auto: increment master version to 17.0.168

feat(resources): add pcm keyboard 🙀

feat(core): implement mapped set mapping 🙀

- simplify, drop normalization entries
- update test

#7042

- keyman side of https://github.com/unicode-org/cldr/pull/3123
- validating that tests pass

#7042

- fix alignment

#9121

auto: increment master version to 17.0.167

chore(common): Update crowdin strings for French

- remove a stray #include

#9121

- passes
- added some utilities on transform_element
- added more validation of transforms
- added tests of utility functions

#9121

- restructured some things, loading and such seems to be in good shape

#9121

auto: increment master version to 17.0.166

- good failing test

feat(core): add display=id 🙀

auto: increment master version to 17.0.165