Add Logo

[jlaehne]

• Add logo
• Change spelling to eXSpy to align with logo
• being at it change copyright notice to 2024
• replace remaining mentioning of the 'HyperSpy developers' instead of 'eXSpy developers'
  Closes Making a Logo #17

Progress of the PR

• Change implemented (can be split into several points),
• docstring updated (if appropriate),
• update user guide (if appropriate),
• add a changelog entry in the upcoming_changes folder (see upcoming_changes/README.rst),
• Check formatting of the changelog entry (and eventual user guide changes) in the docs/readthedocs.org:exspy build of this PR (link in github checks)
• ready for review.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f4342c5) 88.09% compared to head (8254ff3) 88.09%.
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #22   +/-   ##
=======================================
  Coverage   88.09%   88.09%           
=======================================
  Files          67       67           
  Lines        7289     7289           
  Branches     1176     1176           
=======================================
  Hits         6421     6421           
  Misses        593      593           
  Partials      275      275           

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[ericpre]

This may be working but usually library name are all lower case, wouldn't be better to use the lower case here too (and below)?

[jlaehne]

Thought I did a case sensitive replace, but also all occurences in that file are fixed now, as well as some links.