Support for new Dimensions structure in QuantumToolbox

[ytdHuang]

Checklist

Thank you for contributing to HierarchicalEOM.jl! Please make sure you have finished the following tasks before opening the PR.

• Please read Contributing to QuantumToolbox.jl.
• Any code changes were done in a way that does not break public API.
• Appropriate tests were added and tested locally by running: make test.
• Any code changes should be julia formatted by running: make format.
• All documents (in docs/ folder) related to code changes were updated and able to build locally by running: make docs.

Request for a review after you have completed all the tasks. If you have not finished them all, you can also open a Draft Pull Request to let the others know this on-going work.

Description

As title

Related issues or PRs

This PR is currently waiting the following PR to be merged, and QuantumToolbox v0.25.0 to be released:
qutip/QuantumToolbox.jl#360

[codecov]

Codecov Report

Attention: Patch coverage is 95.00000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 91.92%. Comparing base (67438bc) to head (299d471).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
src/heom_matrices/heom_matrix_base.jl	86.36%	3 Missing ⚠️
src/bath/BosonBath.jl	85.71%	1 Missing ⚠️
src/bath/FermionBath.jl	75.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #136      +/-   ##
==========================================
+ Coverage   91.70%   91.92%   +0.21%     
==========================================
  Files          24       24              
  Lines        1483     1498      +15     
==========================================
+ Hits         1360     1377      +17     
+ Misses        123      121       -2     

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