fix(license): clarify interactive license names

[Kemalau]

Closes #448

Why

The interactive license prompt currently shows bare abbreviations such as ASL and MPL, which makes it easy to misread the intended license. This change keeps the saved license keys unchanged while showing expanded names in the interactive menu.

What changed

• render the license picker entries as abbreviation - full name
• keep the existing return values and ordering intact
• extend the interactive test to assert the clearer prompt text

Verification

• static review of the focused diff
• local execution of Julia tests was not possible in this environment because julia is not installed (julia: command not found)

[codecov]

Codecov Report

❌ Patch coverage is 0% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.28%. Comparing base (4847597) to head (7735b3a).

Files with missing lines	Patch %	Lines
src/plugins/license.jl	0.00%	5 Missing ⚠️

❗ There is a different number of reports uploaded between BASE (4847597) and HEAD (7735b3a). Click for more details.

HEAD has 94 uploads less than BASE

Flag	BASE (4847597)	HEAD (7735b3a)
	103	9

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #524      +/-   ##
==========================================
- Coverage   94.11%   88.28%   -5.84%     
==========================================
  Files          24       24              
  Lines         748      751       +3     
==========================================
- Hits          704      663      -41     
- Misses         44       88      +44     

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[oxinabox]

I think we should come back to this after doing
#448 (comment)

[oxinabox]

If we think we still want this now that we are using SPIX names, can you rebase this PR?