initial RFC doc for formula sharing feature

[edyoung]

No description provided.

[codecov]

Codecov Report

Merging #192 (1b03294) into master (7da62f2) will decrease coverage by 0.03%.
The diff coverage is 83.67%.

@@            Coverage Diff             @@
##           master     #192      +/-   ##
==========================================
- Coverage   81.31%   81.28%   -0.04%     
==========================================
  Files          55       55              
  Lines       10885    10877       -8     
==========================================
- Hits         8851     8841      -10     
- Misses       2034     2036       +2     

Impacted Files	Coverage Δ
fract4dgui/main_window.py	63.46% <73.07%> (-0.61%)	⬇️
fract4dgui/director.py	66.52% <93.10%> (+0.41%)	⬆️
fract4dgui/toolbar.py	100.00% <100.00%> (ø)
fract4dgui/undo.py	100.00% <100.00%> (ø)
fract4d/fractconfig.py	90.16% <0.00%> (+0.81%)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 8a62e41...29899ba. Read the comment docs.