`DBUS_SESSION_BUS_PID` gets only set when launching dbus in the process,
but not when it's already running.

When we launch dbus if it is not running, we're probably (un-)installing
keyboards for a different user. This is an unusual environment where not
everything is available, e.g. dconf-service won't be running and can't
be started because DISPLAY variable is not set. This means we can't
write gsettings values through the API. However, we can read them, and we
can write a keyfile and update the database. This is what this change
implements for the cases where we started dbus.

chore(core): refresh API docs for 17.0

Co-authored-by: rc-swag <58423624+rc-swag@users.noreply.github.com>

fix(developer): return after calling await exitProcess

Merge pull request #11009 from keymanapp/fix/developer/11002-kps-editor-should-not-emit-empty-fields

fix(developer): suppress emission of new empty fields in package editor

chore(oem/fv): Update keyboard versions in keyboards.csv

auto: increment beta version to 17.0.293

fix(developer): font file meta data is invalid error

Merge pull request #10991 from keymanapp/fix/developer/remove-unused-keyboard-info-compiler-messages

fix(developer): remove unused keyboard info compiler messages

chore(developer): Merge branch 'beta' into fix/developer/remove-unused-keyboard-info-compiler-messages

auto: increment beta version to 17.0.292

fix(linux): Replace deprecated `pkg_resources` module with `packaging.version`

Also need to start as daemon so that it works when run as a different user.

Previous commit missed a few places where `pkg_resources` module was
used.

If we want to log messages we need to start DBus after we initialized
logging.

Refreshes all of the public API header documentation so we have a single
source for the documentation -- the keyman_core_api.h header. A lot of
reformatting but very little change in terms of content.

This is converted into Markdown by api-header-extractor, and the results
can be copied to help.keyman.com.

Will only do the main keyman_core_api.h for v17 release, in interests of
time. The other headers are primarily internal only and have many
deprecated functions also.

Will also leave the full automation of the documentation generation to a
future PR. The script will be there but it won't run during build for
now.

chore(mac): clean up code obsoleted by core

auto: increment beta version to 17.0.291

Because exitProcess is async, static analysis of the function does not
show process termination, even though it returns Promise<Never>. This
can lead to compiler warnings when it gets confused about missing return
values. So have moved to always returning the value from exitProcess,
even though it will never actually return!

auto: increment beta version to 17.0.290