Update Doxygen documentation with json block examples

[ncdorn]

Current situation

There is currently no concrete example of what each block looks like in a json file. I have added examples of this for all relevant blocks, which show up when the user goes to a specific class in the "Class List" of the developer guide documentation. This will hopefully increase clarity and help new users be able to generate their own json files more effectively. This is my first attempt at improving svZeroDSolver documentation both here and on the Simvascular website addressing #136 .

The only issue here is that the clang-format test is not passing and I have no idea why as I have run the automated clang formatting to the point where no files are changed.

Release Notes

• add json examples for each block into the Doxygen developer guide

Documentation

• all additions were to enhance the documentation

Testing

• currently this is not passing the clang-format test and I have no idea why. All other tests are passing.

Code of Conduct & Contributing Guidelines

• I agree to follow the Code of Conduct and Contributing Guidelines.

[ncdorn]

my local clang-format needed up be updated to 21.1.2 in order to match the GitHub runners clang-format version