docs: internals documentation

[SomePersonFromMars]

Closes RNAA-535

⚠️ Breaking changes ⚠️

Introduced changes

• Note: The internaldocs package currently contains a direct copy‑paste of the audiodocs code. In the upcoming pull request, I’ll extract the shared components into a common module.

Checklist

• Linked relevant issue
• Updated relevant documentation
• Added/Conducted relevant tests
• Performed self-review of the code
• Updated Web Audio API coverage
• Added support for web
• Updated old arch android spec file

[github-actions]

WPT non-regression comparison

PASS — no regressions · 0 improved section(s) · overall 2665 → 2665 (0)

Unchanged sections (28)

Spec section	Base pass	Head pass	Delta
Processing model	0	0	0
Other	52	52	0
AnalyserNode	138	138	0
AudioBuffer	140	140	0
AudioBufferSourceNode	208	208	0
AudioContext	58	58	0
AudioNode	261	261	0
AudioParam	599	599	0
BiquadFilterNode	275	275	0
ChannelMergerNode	30	30	0
ChannelSplitterNode	7	7	0
ConstantSourceNode	59	59	0
ConvolverNode	203	203	0
DelayNode	104	104	0
DestinationNode	0	0	0
DynamicsCompressorNode	4	4	0
GainNode	15	15	0
IIRFilterNode	87	87	0
MediaElementAudioSourceNode	0	0	0
MediaStreamAudioDestinationNode	1	1	0
MediaStreamAudioSourceNode	0	0	0
OfflineAudioContext	35	35	0
OscillatorNode	104	104	0
PannerNode	75	75	0
PeriodicWave	33	33	0
ScriptProcessorNode	0	0	0
StereoPannerNode	102	102	0
WaveShaperNode	75	75	0

_{Baseline: c08ec4548f55091ac28a4efa97c3222ad3ed08c0 · Candidate: c1214f8ac92c0c3870bec49124869568eb90c90d}

_{Workflow run · this comment is updated on every push.}