feat(linux): Add optional bcp47 parameter to km-package-install

fix(linux): Fix lintian warnings

fix(linux): Ignore dbus exception when testing for fcitx

fix(android/engine): Remove duplicate file suffix when installing .kmp

fix(android): bump version_code major calculation

chore(windows): set platform core env explicitly

Version code is, for 17.1.33: 1810033. This supports up to 9999
builds for a given major.minor version. We only support up to 9 minor
versions for a given major version but at present we are not using
minor versions at all.

Despite this calculation, the version_code should be treated as an
opaque integer, used only for Play Store publishing.

NOTE: accidental publish of beta 17.0.6 during 16.0 beta cycle has
forced a version_major bump, which is a permanent change. Relates to
issue #7705.

This directory is unnecessary as it contains log files and cached
files, and it produces several lintian warnings.

auto: increment beta version to 16.0.106

Fixes KEYMAN-LINUX-3H.

This change adds a `--bcp47 <TAG>` parameter to km-package-install.
This allows to specify a language tag which will be used to install
the keyboard for that language.

Closes #7725.

fix(linux): Don't crash if `und` is specified without `fonipa`

fix(linux): set DEB_VERSION

docs(linux): Add example for keyman:// URL format

chore(windows): add unit test for SetupCoreEnvironment

auto: increment beta version to 16.0.105

Fixes #7723.

DEB_VERSION is used to set `pkgversion` in the
`override_dh_auto_build` build step. When we moved to the
consolidated source package and thus could no longer use the
default debhelper build tools we lost the automatic setting of
DEB_VERSION, so this change adds the relevant definitions.

Fixes #7724.

The help text for `km-config` mentioned a `keyman://` URL but we
nowhere explained how that URL should look like. This change adds
an example keyman:// URL with a bcp47 tag which should make things
clearer.

chore(android/engine): Add more logging for keyboard restart

auto: increment beta version to 16.0.104

refactor(linux): Use consts instead of strings

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

fix(windows): check if permissions for thread to access file

chore(windows): include debug info in keyman build

chore(windows): Add safecall for internal CustomisationStorage API interface

fix(windows): handle timeout in downloads

chore(windows): add sentry traces for unsolved crashes