chore: Unbreak release

[aborgna-q]

Replaces the breaking changes introduced in #1587 with non-breaking deprecations.
We should be able to remove these on the next breaking release.

[ss2165]

🫠

[codecov]

Codecov Report

Attention: Patch coverage is 18.51852% with 22 lines in your changes missing coverage. Please review.

Project coverage is 85.64%. Comparing base (d349eee) to head (65acbb2).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
hugr-core/src/package.rs	22.72%	17 Missing ⚠️
hugr-cli/src/lib.rs	0.00%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1591      +/-   ##
==========================================
- Coverage   85.72%   85.64%   -0.08%     
==========================================
  Files         136      136              
  Lines       24891    24918      +27     
  Branches    21827    21854      +27     
==========================================
+ Hits        21338    21342       +4     
- Misses       2445     2468      +23     
  Partials     1108     1108              

Flag	Coverage Δ
python	92.68% <ø> (ø)
rust	84.66% <18.51%> (-0.09%)	⬇️

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[aborgna-q]

I had to add some temporary manual Display/Error impls due to derive_more#419.