🏷️ providing a convenient `CircuitInputType`

[burgholzer]

Description

This PR provides a convenient type that summarizes the default circuit inputs to the load method. Special care is taken that this type is only defined in type checking environments and does not require importing optional dependencies that might not be available at runtime (such as qiskit).

Checklist:

• [x] The pull request only contains commits that are related to it.
• [x] I have added appropriate tests and documentation.
• [x] I have made sure that all CI jobs on GitHub pass.
• [x] The pull request introduces no new warnings and follows the project's style guidelines.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 91.7%. Comparing base (4363502) to head (6a4b2c5). Report is 128 commits behind head on main.

Additional details and impacted files

[](https://app.codecov.io/gh/cda-tum/mqt-core/pull/661?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cda-tum) ```diff @@ Coverage Diff @@ ## main #661 +/- ## ===================================== Coverage 91.7% 91.7% ===================================== Files 148 148 Lines 14832 14832 Branches 2386 2386 ===================================== Hits 13603 13603 Misses 1229 1229 ``` | [Flag](https://app.codecov.io/gh/cda-tum/mqt-core/pull/661/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cda-tum) | Coverage Δ | | *Carryforward flag | |---|---|---|---| | [cpp](https://app.codecov.io/gh/cda-tum/mqt-core/pull/661/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cda-tum) | `91.4% <ø> (ø)` | | Carriedforward from [4363502](https://app.codecov.io/gh/cda-tum/mqt-core/commit/4363502cda0de4b795a467c544da0026a07416d6?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cda-tum) | | [python](https://app.codecov.io/gh/cda-tum/mqt-core/pull/661/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cda-tum) | `99.7% <100.0%> (ø)` | | | *This pull request uses carry forward flags. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cda-tum) to find out more. | [Files with missing lines](https://app.codecov.io/gh/cda-tum/mqt-core/pull/661?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cda-tum) | Coverage Δ | | |---|---|---| | [src/mqt/core/load.py](https://app.codecov.io/gh/cda-tum/mqt-core/pull/661?src=pr&el=tree&filepath=src%2Fmqt%2Fcore%2Fload.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=cda-tum#diff-c3JjL21xdC9jb3JlL2xvYWQucHk=) | `100.0% <100.0%> (ø)` | |