add insert function

[Ruttor]

No description provided.

[Ruttor]

JavaScript currently spits out the error in line 23 of Cache.js:
"Uncaught (in promise) TypeError: Cannot read properties of undefined (reading 'length')
at new Atoms (Cache.js:23:34)
at a. (Cache.js:125:25)
at U.emit (index.mjs:136:20)
at a.value (socket.js:498:20)
at a.value (socket.js:485:18)
at a.value (socket.js:455:22)
at U.emit (index.mjs:136:20)
at manager.js:204:18"

[codecov-commenter]

Codecov Report

Merging #208 (9a4b03d) into main (7492969) will decrease coverage by 0.40%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #208      +/-   ##
==========================================
- Coverage   50.19%   49.80%   -0.40%     
==========================================
  Files           7        7              
  Lines         253      255       +2     
==========================================
  Hits          127      127              
- Misses        126      128       +2     

Files Changed	Coverage Δ
zndraw/zndraw.py	30.70% <0.00%> (-0.50%)	⬇️

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[PythonFZ]

Looks good!