Custom Input: Add type conversion to float and warning

[B-Deforce]

Resolves #30

[B-Deforce]

Should be good now. I implemented and ran the test case and made it more general per your suggestion. Apologies, I'm still kinda new to open-source contributions so had some trouble there... :). Also, I'm using the "Black formatter" so there was some automated formatting done as you'll see.

Let me know if I need to do anything else.

[codecov[bot]]

Codecov Report

Merging #31 (3df9c6b) into main (484d064) will increase coverage by 0.02%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #31      +/-   ##
==========================================
+ Coverage   89.84%   89.87%   +0.02%     
==========================================
  Files          53       53              
  Lines        2078     2083       +5     
==========================================
+ Hits         1867     1872       +5     
  Misses        211      211              

Flag	Coverage Δ
unittests	89.87% <100.00%> (+0.02%)	:arrow_up:

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Impacted Files	Coverage Δ
gutenTAG/base_oscillations/custom_input.py	100.00% <100.00%> (ø)

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[CodeLionX]

Using Black is a good idea.

I think, I will add Black to the project and follow-up with some more test cases.

@B-Deforce thank you for your contribution!