Update the readme with RFCs and v2 plans

[philipch07]

Description

• Documents the RFCs that we reference throughout the library.
• Creates a slightly more visible and organized approach for the anticipated v2 rewrite.

Reference issue

Resolves #267

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.86%. Comparing base (f37b783) to head (0672db6).

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #400      +/-   ##
==========================================
+ Coverage   81.77%   81.86%   +0.08%     
==========================================
  Files          51       51              
  Lines        4522     4522              
==========================================
+ Hits         3698     3702       +4     
+ Misses        680      677       -3     
+ Partials      144      143       -1     

Flag	Coverage Δ
go	81.86% <ø> (+0.08%)	⬆️
wasm	66.82% <ø> (-1.07%)	⬇️

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