Add Mermaid Chart to examples/data-channels

[Sean-Der]

Start new architecture section

[codecov]

Codecov Report

Base: 77.59% // Head: 77.57% // Decreases project coverage by -0.03% ⚠️

Coverage data is based on head (42ded30) compared to base (43d0c5b).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2414      +/-   ##
==========================================
- Coverage   77.59%   77.57%   -0.03%     
==========================================
  Files          87       87              
  Lines        9294     9294              
==========================================
- Hits         7212     7210       -2     
- Misses       1649     1650       +1     
- Partials      433      434       +1     

Flag	Coverage Δ
go	79.34% <ø> (-0.03%)	⬇️
wasm	70.15% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
sctptransport.go	77.15% <0.00%> (-0.75%)	⬇️

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