Optigatrust

* Add options for default configuration for MBEDTLS.

* Add shared memory pthread mutex for multi-process and multi-threads applications for Linux.
* Improve pal_os_event logging.
* Improve logging for Linux UART.
* Improve logging for Windows UART.

* Improved signature encoding for secp521r1 signature.
* Improved logging output.
* Fixed race condition in pal_os_event callback in libusb PAL.
* Added checks to signature padding check.
* Added default configuration for MBedTLS.
* Removed warnings during library compilation.
* Resolved initialization fails when triggering reset.

* Fix to allow compilation using zephyr PAL.
* Changes in README.md for host applications.
* Added missing license headers.

* New folder structure.
* Mbedtls is now configured to be used a submodule from https://github.com/Mbed-TLS/mbedtls/tree/v2.28.7.
* Added support for Zehpyr OS.
* README.md update.
* Fix Metadata configuration for OID 0xE0E8.
* Fix buffer length when reading PBS for shielded I2C connection.

* Update Documentation to match the launch of OPTIGA™ Trust M MTR
* README.md
* Datasheet v3.61
* Solution Reference Manual v3.60
* Config Guide v2.2
* Include new Shields and Get-Started (PSoC62S2)
* Fix Typo in Protected-Update Documentation & Parser