Rename input_scattering_quantity to input_data in DiffractionObject init

[bobleesj]

Closes #212

Since we are doing a big API migration, didn't add deprecation warnings if that's okay.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.69%. Comparing base (fce1a32) to head (f311988).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #215   +/-   ##
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  Coverage   99.69%   99.69%           
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  Files           8        8           
  Lines         325      325           
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  Hits          324      324           
  Misses          1        1           

Files with missing lines	Coverage Δ
tests/test_diffraction_objects.py	100.00% <ø> (ø)

[bobleesj]

@sbillinge ready for review

[sbillinge]

yes, no need to deprecate. Everything is broken in DOs.

I think we need to update docs too. Did you do a global search/replace in PyCharm?

[bobleesj]

@sbillinge made a rookie mistake. Fixed all in the latest commit. Ready for review

The only part left is the content from CHANGELOG.rst from 3.4.0, which should be left out as it is.