The new version of `langtags.json` added a new `_conformance` record
at the top of the file. This change adjusts the indexes where we expect
the `_version` record. It also introduces a const for the index of the
version record to make future updates easier.

In order to be able to build from the command line I had to change
the forward slashes to backslashes in the makefile.

New langtags.json adds data that a test on Linux uses, so this
change adjust the test.

fix(common): support multichar escapes in element sets 🙀

chore(developer): refactor so KmnCompiler only created once within kmc 🙀

fix(developer): improve coverage, add todos 🙀

feat(developer): uset in element string 🙀

docs(linux): Update readme

fix(linux): Remove tags from package description

fix(linux): Add scrollbar to About dialog

Closes #9065.

fix(linux): Fix vertical alignment of labels in About dialog

refactor(linux): Extract methods

refactor(linux): Code refactoring

This is a temporary workaround - see discussion on #8057. While
this is not the perfect solution it should improve things in most
cases.

Fixes #4769.

Fixes #9005.

Turns out `list[str] | None` doesn't work with Python < 3.9 which
comes with Ubuntu 20.04 Focal, so we revert that change.

fix(web): re-establishes web srcmap uploading

fix(web): fixes up Web's InlinedOSK manual test page

chore(ios): standardizes iOS build scripts

Merge branch 'chore/developer-7377-refactor-kmn-epic-ldml' into fix/common-7377-multi-escape-reorder-epic-ldml

Merge branch 'fix/developer-8069-coverage-todo-epic-ldml' into chore/developer-7377-refactor-kmn-epic-ldml

- fix to the fix

for: #8069

fix(linux): Fix packaging GHA

auto: increment master version to 17.0.134

- \u{22 0127} acts like \u{22}\u{0127}

for: #7377

Revert to relative paths.

- remove async SectionCompiler.init()  and all callers
- the usetparser lives on the DependencySections, initialized by kmc-ldml (and by the test harnesses)

for: #7377

- skip coverage on some actual internal errors
- add todos where coverage is needed

for: #8069