Build modularization (#2893)

This change is to improve build modularization/interdependence between multiple API's, which speeds up builds, making changes. Now small changes in those new libs should not trigger whole rebuild, and changes in unrelated dependencies (included in lib_ovms like opencv) should not trigger rebuild of model instance. Compilation time per translation unit is also be much smaller since there is much less inlcude files & compilation parameters per unit.

Most of changes is moving code around with adding few interfaces:

* Add servable change notification interface
Servable/NotifyReceiver (for better independence of DAG/Model Instance)
* Add RequestProcessor interface
(for handling Stateful Models)
* Add RequestTraits for extracting associated types related to appropriate API

* clang-format header reordering turn off
Due to using templates in serialization/deserialization, parts of the code depend on header ordering so headers reordering was turned off in clang-format.
Ideally we would have one header for serialization/deserialization with templates for which specialization need to be provided for specific API (KFS/TFS/CAPI).

* ovms_lib was splited into several smaller libs
This is work TBC as there is some work left to do with DAGs. So far we used convention to name libraries(cc_library name field) libovms_NAME, but in result this produces liblibovms_NAME.so so in this change I started using just NAME. OVMS prefix is also unnecessary since even when including our libs from other repository like Mediapipe you already prefix it with name of repo (@ovms//src:).

* Fixed FP16 opencv binary inputs handling

There are still few FIXME/TODOS but the most important ones are resolved.
Custom loaders/Stateful tests are removed since this feature is to be dropped anyway.

Ticket:CVS-162989

Author: atobiszei

.clang-format

@@ -80,7 +80,9 @@ PenaltyExcessCharacter: 1000000
 PenaltyReturnTypeOnItsOwnLine: 60
 PointerAlignment: Left
 ReflowComments:  true
-SortIncludes:    true
+# TODO @atobisze after modularization
+# try to switch back at some point
+SortIncludes:    false
 SpaceAfterCStyleCast: false
 SpaceBeforeAssignmentOperators: true
 SpaceBeforeParens: ControlStatements

Dockerfile.ubuntu

@@ -119,6 +119,7 @@ RUN apt-get update && apt-get install --no-install-recommends -y \
             python3-pip \
             unzip \
             gdb \
+            tree \
             vim && \
             apt-get clean && \
             rm -rf /var/lib/apt/lists/*