Gregory v1.0.0

What's changed

• chore: bump version to 1.0.0
• ci: add CI github action
• ci: github release action
• feat:add portamento
• feat: add unison mode
• docs: better app screenshot
• docs: mention random patches func in README
• feat: option to create random patch
• feat: support MIDI channel filtering
• feat: UI for patches save/load
• feat: add patches save/list/load/delete
• refactor: move mod_wheel management from patch to engine
• feat: clean shutdown on Ctrl+C
• feat: use clap to parse command args
• docs: rearrange sections in readme
• docs: add UI image to README
• refactor: rotary knobs and beter layout
• feat: add UI
• chore: add readme and license
• feat: support mod wheel for filter cutoff
• feat: support pitch wheel
• feat: add midi input
• feat: scaffold main binary with cpal streaming
• feat: add dsp engine
• refactor: remove redundant typing leftovers
• feat: add adsr envelope
• feat: add moog ladder low-pass filter
• refactor: tidy up test_wav
• feat: an oscillator with naive square/saw