Extend canonical AudioWorkletNode example, add message passing

[orottier]

No description provided.

[github-actions]

Benchmark result:


bench_ctor
  Instructions:             4483565 (No change)
  L1 Accesses:              6662812 (No change)
  L2 Accesses:                54017 (No change)
  RAM Accesses:               61375 (No change)
  Estimated Cycles:         9081022 (No change)

bench_sine
  Instructions:            70901633 (No change)
  L1 Accesses:            103406218 (No change)
  L2 Accesses:               262365 (No change)
  RAM Accesses:               62244 (No change)
  Estimated Cycles:       106896583 (No change)

bench_sine_gain
  Instructions:            75792640 (No change)
  L1 Accesses:            110728689 (No change)
  L2 Accesses:               271847 (No change)
  RAM Accesses:               62350 (No change)
  Estimated Cycles:       114270174 (No change)

bench_sine_gain_delay
  Instructions:           150658920 (No change)
  L1 Accesses:            213099505 (No change)
  L2 Accesses:               569995 (No change)
  RAM Accesses:               64000 (No change)
  Estimated Cycles:       218189480 (No change)

bench_buffer_src
  Instructions:            17646667 (+0.000091%)
  L1 Accesses:             25367090 (+0.000071%)
  L2 Accesses:                86258 (No change)
  RAM Accesses:              100419 (No change)
  Estimated Cycles:        29313045 (+0.000061%)

bench_buffer_src_delay
  Instructions:            91134816 (+0.000022%)
  L1 Accesses:            125914560 (+0.000017%)
  L2 Accesses:               161421 (No change)
  RAM Accesses:              100614 (-0.000994%)
  Estimated Cycles:       130243155 (-0.000011%)

bench_buffer_src_iir
  Instructions:            41679940 (-0.000010%)
  L1 Accesses:             60354792 (-0.000010%)
  L2 Accesses:                87662 (No change)
  RAM Accesses:              100524 (No change)
  Estimated Cycles:        64311442 (-0.000009%)

bench_buffer_src_biquad
  Instructions:            37821061 (-0.000011%)
  L1 Accesses:             52920539 (+0.000008%)
  L2 Accesses:               113154 (-0.000884%)
  RAM Accesses:              100653 (-0.003974%)
  Estimated Cycles:        57009164 (-0.000247%)

bench_stereo_positional
  Instructions:            44681750 (+0.000045%)
  L1 Accesses:             66119484 (+0.000032%)
  L2 Accesses:               218547 (No change)
  RAM Accesses:              100800 (-0.000992%)
  Estimated Cycles:        70740219 (-0.000020%)

bench_stereo_panning_automation
  Instructions:            32247188 (+0.000037%)
  L1 Accesses:             47880178 (+0.000021%)
  L2 Accesses:               134863 (+0.001483%)
  RAM Accesses:              100533 (+0.000995%)
  Estimated Cycles:        52073148 (+0.000106%)

bench_analyser_node
  Instructions:            39459171 (+0.000030%)
  L1 Accesses:             55189308 (+0.000024%)
  L2 Accesses:               187740 (-0.000533%)
  RAM Accesses:              101075 (+0.000989%)
  Estimated Cycles:        59665633 (+0.000072%)