* Squash commit: implement Conversion extensions
* Refactor PaddlePaddle FrontEnd
* Codestyle
* FrontEnd,InputModel,Place base classes -> abstract, renamed model file
* Fix unit tests
* fix unit tests
* ngraph:: to ov::
* Rename frontends dir to frontend
* fix merge conflicts
* Fix ConversionExtension
* get rid of NamedInputs/Outputs in TF FE
* Rename paddlepaddle to paddle; pdpd to paddle
* add missing file
* codestyle
* Remove local change
* paddlepaddle -> paddle for azure configs and .md files
* fix package name, fix config files
* Fix win build
* Revert Broadcast/AutoBroadcast changes
* codestyle
* fix FronEnd class
* fix ngraph_cpp_api.config
* fix incorrect merge, codestyle
* fix conversion extension
* conversion extension
* codestyle
* merge master
* fix build
* refactoring; revert broadcast/autobroadcast changes
* codestyle
* fix MacOS config
* resolve merge conflicts
* refactor includes
* register ConversionExtension in FrontEnds
* move get_op_type to base NodeContex class
* set op_translator map in ctor of Paddle FE; fix unit tests
* update unit tests; codestyle
* codestyle
* preliminary version of conversion extension in pybind
* conversion extension
* get_attribute_as_any method for NodeContext
* move get_attribute methods to NodeContext base class, rename get_ng_input to get_input
* add missed file
* Implement ov::Any getter in ONNX NodeContext
* fix py bindings
* Add update ConversionExtension unit tests, add SO unit tests, fix TF FE
* fix segfault on destructor
* fix NodeContext interface, fix unit tests
* set different names for ConversionExtensions in unit tests
* fix PaddleFuzzy tests
* fix Paddle Fuzzy tests
* revert changes in generate_slice.py
* fix codestyle
* fix pybindings
* revert local changes in generate_slice.py
* delete duplicate exceptions.hpp
* Refactoring: fix names according to convention
* pybinding for NodeContext, FrontEnd, ConversionExtension; fix unit tests; implement new unit tests
* Refactoring
* fix the case when a new converter rewrites existed one; delete unnecessary NodeContext from pybindings; use CreatorFunctons from the base class in ConversionExtension; update unit tests
* Revert local change
* PythonAPI: fix get_attribute method; fix get_input method; implement support of dtype and default attributes
* Fix py unit tests: add support for vector<ov::element::Type> as attribute
* resolve review comments
* fix unit tests
* move extension_holder to openvino/frontend/extension folder
* fix build on mac os
* temporary disable cast from vector<bool> to investigate issue on mac os
* Resolve review comments
* Resolve review comments
* Use dev API for .so extension
* Link frontends to pyopenvino as separate targets
* Temporary enable tf fe installation
* ignore PEP8 E402 for init files, set correct directory for py modules
* revert local changes
* Fix deadlock in pybind GIL; fix Win build; fix PEP8
* fix PEP8
* Add a return type annotation
* fix builds; fix ON/OFF switcher for ENABLE_OV_xxx_FRONTEND cmake options
* Fix the issue with ifdefs on WinOS; fix the issue related to pybindings and static c++ object
* fix python unit tests
* fix static build on WinOS
* Retrigger CI builds
* Fix static build on Windows
* fix static build on Windows again
* Retrigger CI
* delete unused includes; add a comment about issue on MacOS
* fix missprint
* resolve review comments
* fix missprint
* resolve review remarks
* Resolve review comments
* win win wheels build
* resolve review comments
Jan Iwaszkiewicz