Relates to #9948. Starts basic support for v2.0 projects.

For all operating modes:

- Remove blank projects / untitled projects mode
- Add Open Project Folder buttons and links
- Remove Project Save As
- Render uses in-memory XML
- Upgrade to v2.0 project file (along with checks)

For v2.0 projects:

- Remove 'Add File to Project'
- Populate Files to list all files in folder (note: consider efficiency
  here as currently files are parsed for subfile data)
- Version 2.0 project options and defaults

Fixes #9923.

These are no longer used because we now use kmc for builds. This also
means that the kmcomp-x64-structures test is no longer required, because
that was used to keep the Delphi and C++ structures in sync.

There are some minor details around error message identifiers that are
still present in a handful of places, but they are work for another
time.

fix(developer): enable line breaks in debugger

Merge pull request #9922 from keymanapp/fix/developer/7851-restore-selection-to-same-key-in-layout-builder

fix(developer): restore selection in layout builder even with duplicate ids

fix(developer): warn if layer switch key is missing ID

chore(developer): rename messages.ts for clarity

feat(developer): Compile button in TIKE toolbar

fix(developer): raise error if virtual key in context string

feat(developer): extract font family from .ttf in kmc-keyboard-info

Merge pull request #9914 from keymanapp/fix/developer/7852-layout-builder-maintain-presentation-during-undo

fix(developer): layout builder - maintain presentation during undo

fix(developer): enable and update unit tests

fix(developer): open editor links in new window

chore(developer): change field label to 'Related Package ID' in Related Packages dialog

chore(common): fixup SchemaValidators error handling

fix(developer): Project MRU now saves correctly

chore(developer): verify kmp.json output from kmc-package

fix(developer): debug flag for compiling keyboards

fix(developer): compiler crash when no project loaded

Merge branch 'fix/developer/9889-compiler-crash-without-project' into fix/developer/9885-debug-flag-not-working-in-tike

fix(web): fixes doc-kbd display of default layer when it's not defined first

Fixes #7851.

Note that this fixes the selection pop issue with duplicate ids in some
scenarios but not all. For example, the undo stack doesn't have enough
detail at this point to be able to track this. This fix addresses the
most egregious issue relating to key size adjustment and similar.

Fixes #8000.

In earlier versions of KeymanWeb, it was assumed that layer switch keys
would not necessarily need an identifier, as they would not be
generating a standard KeymanWeb key event. However, this assumption does
not really hold, so we should be warning on missing identifiers for
layer switch keys.

Renames two messages.ts to kmn-compiler-messages.ts and
kmw-compiler-messages.ts, as otherwise confusion reigns.

Also a minor cleanup of the error messages from touch layout processing,
to clarify message names and return appropriate message for missing
layout file.

Fixes #7852.

When undo is run in the layout builder, it is better to keep the user's
selected presentation if possible. (The selected presentation is not
stored in the undo stack, but is a view property affected by the
currently selected platform.)

Fixes #7891.

Fixes #7880.

Virtual keys have never been allowed in context. This should be an error
in a keyboard. Note: virtual keys in output are officially unsupported
but still kinda sorta a little bit work in Windows -- but I doubt they
will ever be officially supported.

Also includes small side journey to tidy up names and constants for two
other tests (error_duplicate_group and error_duplicate_store).

Several unit tests were not running as they were not referenced in
developer/src/test/auto/Makefile. This meant that some tests were
outdated:

* two keyboard fixtures needed recompiling with kmcomp in order to match
* some interfaces had changed slightly, necessitating updates to
  corresponding unit tests.

Fixes #9444.

Fixes #9849.

Fixes #9853.

Fixes #9854.

Fixes #9899.

Several problems resolved here:
* project mru did not refresh the welcome screen on first load, so the
  welcome screen was often showing projects that were no longer relevant
* content saved to registry did not match expectations on load, so mru
  never worked between sessions (always flushed on reload)
* synchronization between simultaneous sessions did not work, because
  the list was only saved when Keyman Developer exited

Minor tidyup:
* WideString -> string -- legacy cleanup from when Delphi was
  non-Unicode.
* Reordered functions to group more clearly.

Note: the issue was not that there was both registry and xml content;
the source of truth is the registry for Project MRU, and project_mru.xml
is copied from that for the welcome screen. So instead of taking the
fix recommended in #9899, have addressed this by fixing the above points
in the registry code.

Fixes #9885.

The 'Include Debug Info' flag was being ignored by the kmc wrapper.

auto: increment master version to 17.0.204

Fixes #9889.

This arises from a deprecated way of using Keyman Developer by starting
Keyman Developer by opening a keyboard .kmn file from Explorer, which
causes Developer to run in a 'projectless' mode. This was not tested in
the new compiler integration, and that has caused this crash.

In 'projectless' mode, there is still a global 'untitled' project, but
the files loaded do not 'belong' to it. The compiler settings are
inherited from the global 'untitled' project in this case.