Add summary reportlets to HTML report

[tsalo]

Related to #13. Still missing run-wise anatomical and DWI summaries.

Changes proposed in this pull request

• Add "About" reportlet with command.
• Add "Summary" reportlet with summary of collected data.
• Write out top-level reportlets to individual reconstruction pipelines' output directories.
• Pin nireports to new release that supports PNGs.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 48.52941% with 35 lines in your changes missing coverage. Please review.

Project coverage is 33.75%. Comparing base (e780ae1) to head (bcd8bcd).

Files	Patch %	Lines
qsirecon/workflows/base.py	12.50%	28 Missing :warning:
qsirecon/interfaces/utils.py	66.66%	4 Missing :warning:
qsirecon/interfaces/reports.py	75.00%	2 Missing and 1 partial :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #61 +/- ## ========================================== + Coverage 33.52% 33.75% +0.22% ========================================== Files 56 56 Lines 6824 6852 +28 Branches 891 892 +1 ========================================== + Hits 2288 2313 +25 Misses 4438 4438 - Partials 98 101 +3 ```

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[tsalo]

The summary reportlets are being written to the output_dir rather than individual QSIRecon pipeline directories. I could either move the reportlet generation to the individual pipelines' workflows or copy any reportlets to the pipeline directories. I'm leaning toward the latter.

[tsalo]

@mattcieslak do you think QSIRecon should write out the recon spec? It seems useful.

[mattcieslak]

@mattcieslak do you think QSIRecon should write out the recon spec? It seems useful.

Definitely. It's at least as important as the config.toml file

[tsalo]

I add that in then

[tsalo]

Okay it's added and it looks good.