fix typo in an enum and remove deprecated enum.

Fix function signatures for Type 0 (Utility) messages.

They became groupless at 2023 specification updates, and we did not update
the API, which we should have done that as of v0.6. Now it is done as v0.9 API.

Add cmidi2_ump_sysex7_process_n() that takes length as the argument too.

It is required when we forward UMP-originated bytes to `sendUMP`.

bump version in CMakeLists.txt to 0.7 to make new release.

I noticed that I haven't managed this version number...

update README for v0.6 release.

add full UMP to MIDI1/SMF bytestream translator, with some breaking c…

…hanges.

- There are fixes in 64bit serialization regarding endianness.
- UMP to MIDI1 single translator is removed (internalized) and there is
  now `cmidi2_convert_ump_to_midi1()` which handles full translation and
  JR Timestamp to deltaTime converter (which leaves some TODOs though).

fix bank select calculation in cmidi2_convert_midi1_to_ump().

(and some cosmetic code comment)

update README. It's 1300 LoC, not tiny at all... Also bump version to…

… 0.3.4.

Add MIDI1 CC, RPN and META event constants.

it will be tagged as 0.3.2.