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

Closes #91

tracker/presets/BA/80s_bass.yml

@@ -0,0 +1,29 @@
+numvoices: 1
+units:
+    - type: oscillator
+      id: 3
+      parameters: {color: 0, detune: 64, gain: 64, lfo: 0, phase: 0, shape: 64, stereo: 1, transpose: 64, type: 2, unison: 0}
+    - type: oscillator
+      id: 4
+      parameters: {color: 47, detune: 71, gain: 64, lfo: 0, phase: 0, shape: 64, stereo: 1, transpose: 52, type: 2, unison: 3}
+    - type: addp
+      id: 1084
+      parameters: {stereo: 1}
+    - type: envelope
+      id: 1085
+      parameters: {attack: 6, decay: 67, gain: 102, release: 65, stereo: 1, sustain: 30}
+    - type: send
+      id: 1088
+      parameters: {amount: 116, port: 0, sendpop: 0, stereo: 1, target: 1087, voice: 0}
+    - type: mulp
+      id: 1086
+      parameters: {stereo: 1}
+    - type: filter
+      id: 1087
+      parameters: {bandpass: 0, frequency: 14, highpass: 0, lowpass: 1, resonance: 114, stereo: 1}
+    - type: pan
+      id: 284
+      parameters: {panning: 64, stereo: 1}
+    - type: outaux
+      id: 15
+      parameters: {auxgain: 1, outgain: 17, stereo: 1}