Fix SIDScore vibrato instrument loading

[turesheim]

Summary:

• Clear cached SID instrument state before score playback so incoming score/tune/voice state hydrates the instrument controls.
• Add the presentation demo score with VIBRATO=0,32,128,0 for the vibrato tune so the panel receives fine-vibrato fields.

Tests:

• java -Dsidscore.kickass.jar=resources/KickAss.jar -jar resources/sidscore-cli-0.7.1.jar example-workspace/Presentasjon/demo.sidscore --tune 5 --asm /tmp/commodore-commander-demo-tune5.asm --no-play
• npm run build --workspace @commodore-commander/theia-extension
• node --test packages/theia-extension/lib/test/sidscore-instrument-protocol.test.js packages/theia-extension/lib/test/sid-instrument-protocol-controls.test.js packages/theia-extension/lib/test/sid-instrument-vibrato.test.js packages/theia-extension/lib/test/sidscore-playback-routing.test.js

Notes:

• Other pre-existing dirty example-workspace/reference files were not included in this PR.