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 +/- ##
=======================================
Coverage 99.69% 99.69% =======================================
Files 8 8 Lines 325 325 =======================================
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.