Fixes #10582.

Returned struct from the `km_core_state_get_actions()` API is now owned
by the state object. This is a change in API contract. The corresponding
`km_core_actions_dispose()` API has been made private, because there is
never any need for API consumers to call it. As this change is happening
in alpha, we won't bump the ABI version.

`state->app_context` is now guaranteed to be in sync with
`state->context` after `km_core_process_event()`, with the actions
struct populated at that point.

The next and final step in this refactor is to remove the actions queue
altogether from the Core and make that a kmn-only concept, but that will
wait until 18.0. The only consumers of the actions queue are the
kmn-specific interactive debugger in Keyman Developer, and kmn-specific
Input Method eXtensions in Keyman Engine for Windows.

Fixes #10520.

The definitions for `struct km_core_action_item`, `struct
km_core_backspace_item`, `enum km_core_backspace_type`, `enum
km_core_action_type`, `km_core_state_action_items()`,
`km_core_state_queue_action_items()`, `km_core_process_queued_actions()`
are now in keyman_core_api_actions.h rather than in the primary
keyman_core_api.h, as they should not be used by engines in general.

The current users of those APIs are the interactive kmx debugger, and
the IMX integration in Keyman Engine for Windows. Both of these depend
on the old action queue model rather than the actions struct.

In a future version, we may refactor these further to make them apply
directly to the KMX processor, and provide access via an interface to
the KMX processor rather than as a general Core API. Once this change is
made, then Core itself will no longer support action queues at all, and
will expect keyboard processors to fill in an action struct (this is
already done for LDML).

Use the delete_context memember of the action struct to
check for surrogates and determine the code units to delete.

epic: Keyman Core normalization 🌱

auto: increment master version to 17.0.257

feat(developer): turn on developer side normalization 🙀

fix(linux): packaging on Ubuntu and Debian servers should give message instead of warning because we don't have patched ibus there

chore(core): `process_output_action` needs const `output_utf32` parameter 🌱

When the action from the core is to persist an option there
is no need to write that value back to the core as it has already
been updated, by the core.

feat(core): add `deleted_context` to `km_core_actions` struct 🌱

fix(developer): support surrogate pairs in ldml debugger 🌱

auto: increment master version to 17.0.256

When building packages warnings are treated as errors. When building on
Ubuntu and Debian servers we don't have a patched ibus version but still
want to build the packages. So this change outputs a message instead of
a warning when building packages.

chore(linux): Build with webkitgtk 4.1 instead of 4.0

refactor(linux): Use `km_core_actions` struct instead of queue 🌱

fix(core): Fix nuances when updating context 🌱

- repertoire test needed normalization also

For: #10317

- re-sort string by NFD

For: #10317

feat(developer): ldml marker normalization fix 🙀

chore(core): Merge remote-tracking branch 'origin/epic/core/9999-normalization' into fix/core/10100-ContextNuances

# Conflicts:
#	core/tests/unit/kmnkbd/state_context_api.cpp

Fixes #10530.

Adds the deleted_context member to the km_core_actions struct, and
associated unit tests. Simplifies integration by providing the consumer
with all the data they need in order to execute the transform,
specifically around number of delete operations required, without
needing to query the target application context again. The number of
delete operations will vary according to application compliance and
selected encoding; for example a UTF-16 string may require 2
delete-backs for surrogate pairs in the text buffer for a compliant app,
whereas there will be a single delete-back key event for a non-compliant
app.

The deleted_context member should also be used for debug assertions.

chore(ios): eliminate xcglogger dependency

Fixes #10501.

auto: increment master version to 17.0.255

- normalize in key.to, tran.from, tran.to
- add as an option in the strs pipeline

- also, assertCodePoints utility for asserting with escapes

For: #10317

- also, change this.X to Class.X for statics

For: #10317

feat(core): ldml marker normalization fix 🙀

- ts side

For: #10516