Rename to ptychography40; update links

[uellue]

Closes #37

Contributor Checklist:

• [x] I have added myself to the creators.json file
• [N/A] I have added a changelog entry for my contribution
• [x] I have added/updated documentation for all user-facing changes
• [x] I have added/updated test cases

[codecov[bot]]

Codecov Report

Merging #38 (0027ca8) into master (673be40) will not change coverage. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #38   +/-   ##
=======================================
  Coverage   66.90%   66.90%           
=======================================
  Files           8        8           
  Lines         278      278           
  Branches       29       29           
=======================================
  Hits          186      186           
  Misses         81       81           
  Partials       11       11           

Impacted Files	Coverage Δ
src/ptychography40/__init__.py	57.14% <ø> (ø)
src/ptychography40/__version__.py	100.00% <ø> (ø)
src/ptychography40/reconstruction/common.py	56.66% <ø> (ø)
src/ptychography40/stitching/stitching.py	90.90% <ø> (ø)
src/ptychography40/versioning.py	0.00% <ø> (ø)
src/ptychography40/reconstruction/ssb/__init__.py	100.00% <100.00%> (ø)
src/ptychography40/reconstruction/ssb/trotters.py	64.19% <100.00%> (ø)
src/ptychography40/reconstruction/ssb/udf.py	73.80% <100.00%> (ø)

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