Release template_v2.0.0

Breaking Changes

• Migrate to Golioth Firmware SDK at v0.10.0
  • All header file and API call names have changed
  • Many Golioth Kconfig symbols have changed
  • OTA firmware update code is greatly simplified

Added

• GitHub Actions workflows to build release binaries

Changed

• Firmware version number is now passed as a symbol in the prj.conf file and not as a build argument
• Use LTE Link handler from Golioth Common Library
  • The majority of LTE Link handler callback is logging so this has been reused from the common
    library
  • An additional callback is registered in the application just to service on-connect events
• Board definitions related to Ostentus face place moved to a common file that may be included when
  needed