Add DimensionalData extension

[odow]

This PR is a replacement for #3383. I've added a new branch to the jump-dev remote so that we can generate documentation previews.

https://jump.dev/JuMP.jl/previews/PR3413/extensions/DimensionalData/

I'm going to mark this as closing #3214. I don't think we need to implement methods for DenseAxisArray, we just need to make it easier to integrate with other array packages.

Closes #3214

[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: -0.02% ⚠️

Comparison is base (0ba286e) 98.00% compared to head (74d513f) 97.98%.

❗ Current head 74d513f differs from pull request most recent head 4e08d62. Consider uploading reports for the commit 4e08d62 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3413      +/-   ##
==========================================
- Coverage   98.00%   97.98%   -0.02%     
==========================================
  Files          34       36       +2     
  Lines        5003     4966      -37     
==========================================
- Hits         4903     4866      -37     
  Misses        100      100              

Files Changed	Coverage Δ
ext/JuMPDimensionalDataExt.jl	100.00% <100.00%> (ø)
ext/test_DimensionalData.jl	100.00% <100.00%> (ø)

... and 18 files with indirect coverage changes

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[odow]

So this PR now has tests and documentation.

It seems reasonable to merge, but it's worth a discussion on the long-term maintenance cost vs the additional features that are offered.

[odow]

Discussed breaking changes in DimensionalData here: rafaqz/DimensionalData.jl#491. None are immediately planned, but there might be a couple before v1.0.

Any changes are very unlikely to impact the code in JuMP, so consensus from the monthly call seemed to be that we should move forward with this case, and re-evaluate other extensions on a case-by-case basis.

I am interested to see how the Pkg extensions go more generally, and whether they lead to questions on the forum.

[odow]

Discussed and approved during the hackathon.