Add feko read

[nmahesh1412]

Description

added a feko_beam.py to read in feko .ffe files

Motivation and Context

adds the capability of reading in aFEKO simulation file

Types of changes

• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation change (documentation changes only)
• Version change
• Build or continuous integration change

Checklist:

• I have read the contribution guide.
• My code follows the code style of this project.

Bug fix checklist:

• My fix includes a new test that breaks as a result of the bug (if possible).
• All new and existing tests pass.
• I have updated the CHANGELOG.

New feature checklist:

• I have added or updated the docstrings associated with my feature using the numpy docstring format.
• I have updated the tutorial to highlight my new feature (if appropriate).
• I have added tests to cover my new feature.
• All new and existing tests pass.
• I have updated the CHANGELOG.

Breaking change checklist:

• I have updated the docstrings associated with my change using the numpy docstring format.
• I have updated the tutorial to reflect my changes (if appropriate).
• My change includes backwards compatibility and deprecation warnings (if possible).
• I have added tests to cover my changes.
• All new and existing tests pass.
• I have updated the CHANGELOG.

Documentation change checklist:

• Any updated docstrings use the numpy docstring format.
• If this is a significant change to the readme or other docs, I have checked that they are rendered properly on ReadTheDocs. (you may need help to get this branch to build on RTD, just ask!)

Version change checklist:

• I have updated the CHANGELOG to put all the unreleased changes under the new version (leaving the unreleased section empty).
• I have noted any dependency changes since the last version and will update the conda package build accordingly.

Build or continuous integration change checklist:

• If required or optional dependencies have changed (including version numbers), I have updated the readme to reflect this.
• If this is a new CI setup, I have added the associated badge to the readme and to references/make_index.py (if appropriate).

[codecov]

Codecov Report

Merging #1328 (5ca0937) into main (b75d028) will decrease coverage by 1.38%.
The diff coverage is 0.70%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1328      +/-   ##
==========================================
- Coverage   99.92%   98.55%   -1.38%     
==========================================
  Files          36       37       +1     
  Lines       20202    20485     +283     
==========================================
+ Hits        20186    20188       +2     
- Misses         16      297     +281     

Files	Coverage Δ
pyuvdata/uvbeam/uvbeam.py	92.41% <1.49%> (-7.59%)	⬇️
pyuvdata/uvbeam/feko_beam.py	0.00% <0.00%> (ø)

---

Continue to review full report in Codecov by Sentry.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update b75d028...5ca0937. Read the comment docs.