v0.5.0

This is a major Erlang and Buildroot update. This updates from Erlang/OTP 27 to
Erlang/OTP 28.

• Changes

  • Switch IEx console prompt to UART where it's possible to use
  • Remove unused Vulcan and software renderers
  • Remove unneeded call to rngd and the rng-tools package. This was
    formerly needed to provide entropy to Linux during initialization.

• Package updates

  • nerves_system_br v1.32.3 release notes

• Updated dependencies

  • Erlang/OTP 28.1.1
  • Buildroot 2025.05.2