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

Closes #91

tracker/presets/BA/Deep_bass.yml

@@ -0,0 +1,32 @@
+numvoices: 2
+units:
+    - type: envelope
+      id: 160
+      parameters: {attack: 32, decay: 0, gain: 80, release: 64, stereo: 0, sustain: 128}
+    - type: push
+      id: 161
+      parameters: {stereo: 0}
+    - type: oscillator
+      id: 162
+      parameters: {color: 64, detune: 64, gain: 128, lfo: 0, phase: 32, shape: 42, stereo: 0, transpose: 52, type: 1, unison: 0}
+    - type: addp
+      id: 163
+      parameters: {stereo: 0}
+    - type: oscillator
+      id: 164
+      parameters: {color: 128, detune: 69, gain: 64, lfo: 0, phase: 0, shape: 64, stereo: 0, transpose: 52, type: 0, unison: 0}
+    - type: addp
+      id: 165
+      parameters: {stereo: 0}
+    - type: mulp
+      id: 166
+      parameters: {stereo: 0}
+    - type: send
+      id: 167
+      parameters: {amount: 48, port: 0, sendpop: 0, target: 168}
+    - type: pan
+      id: 168
+      parameters: {panning: 80, stereo: 0}
+    - type: outaux
+      id: 169
+      parameters: {auxgain: 4, outgain: 28, stereo: 1}