feat(tracker): add a preset explorer with search and filters

Closes #91

tracker/presets/KEYS/Rhodes.yml

@@ -0,0 +1,47 @@
+numvoices: 2
+units:
+    - id: 183
+      parameters: {}
+      comment: Modulations
+    - type: oscillator
+      id: 2
+      parameters: {color: 64, detune: 64, gain: 70, lfo: 0, phase: 64, shape: 43, stereo: 1, transpose: 64, type: 0, unison: 0}
+    - type: send
+      id: 3
+      parameters: {amount: 90, port: 2, sendpop: 1, stereo: 1, target: 5}
+    - id: 184
+      parameters: {}
+      comment: Envelope & osc
+    - type: envelope
+      id: 1
+      parameters: {attack: 23, decay: 84, gain: 64, release: 64, stereo: 0, sustain: 58}
+    - type: send
+      id: 182
+      parameters: {amount: 87, port: 0, sendpop: 0, stereo: 0, target: 175, voice: 0}
+    - type: oscillator
+      id: 5
+      parameters: {color: 128, detune: 64, gain: 64, lfo: 0, phase: 92, shape: 64, stereo: 0, transpose: 64, type: 0, unison: 0}
+    - type: mulp
+      id: 6
+      parameters: {stereo: 0}
+    - id: 185
+      parameters: {}
+      comment: Filter & output
+    - type: filter
+      id: 175
+      parameters: {bandpass: 0, frequency: 38, highpass: 0, lowpass: 1, resonance: 111, stereo: 0}
+    - type: pan
+      id: 176
+      parameters: {panning: 64, stereo: 0}
+    - type: outaux
+      id: 177
+      parameters: {auxgain: 15, outgain: 64, stereo: 1}
+    - id: 186
+      parameters: {}
+      comment: Panning modulation
+    - type: oscillator
+      id: 180
+      parameters: {color: 128, detune: 64, gain: 33, lfo: 1, phase: 0, shape: 64, stereo: 0, transpose: 63, type: 0, unison: 0}
+    - type: send
+      id: 181
+      parameters: {amount: 128, port: 0, sendpop: 1, stereo: 0, target: 176, voice: 0}