Add pure fusion rate profiles

[chris-ashe]

Description

Following on from plotting put in for the radiation in #4625 . The true space profiles for the fusion reactions both in log and linear scale have been added.

🐛

Some text overlap problems have also been fixed as noted by issue #4667

Checklist

I confirm that I have completed the following checks:

• My changes follow the PROCESS style guide
• I have justified any large differences in the regression tests caused by this pull request in the comments.
• I have added new tests where appropriate for the changes I have made.
• If I have had to change any existing unit or integration tests, I have justified this change in the pull request comments.
• If I have made documentation changes, I have checked they render correctly.
• I have added documentation for my change, if appropriate.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 3.38983% with 57 lines in your changes missing coverage. Please review.
✅ Project coverage is 49.80%. Comparing base (de7f23e) to head (7563187).

Files with missing lines	Patch %	Lines
process/core/io/plot/summary.py	3.38%	57 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4654      +/-   ##
==========================================
- Coverage   49.88%   49.80%   -0.08%     
==========================================
  Files         151      151              
  Lines       30220    30269      +49     
==========================================
+ Hits        15074    15075       +1     
- Misses      15146    15194      +48     

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[je-cook]

Would it be better to have the legend located in the top right/left? In the linear scale isnt one of the interesting sections under the legend?

[chris-ashe]

Would it be better to have the legend located in the top right/left? In the linear scale isnt one of the interesting sections under the legend?

Done