[DOC] Update resource page with dataset and link to Dash app visualizations

[jsheunis]

Addresses #552 and closes #633.

Changes proposed in this pull request:

• Added a new section to the resource page to introduce and link to the Dash app for visualizing study parameters and MRI sequence parameters. NOTE: when adding a new section below the iframe for the google sheet, this section wouldn't render when building locally. To circumvent this, I added the new section above the iframe, and updated the reference to the sheet in the "Publications using multi-echo fMRI" section, to point to it being at the bottom of the page. If anyone feels there's a more intuitive way of ordering these sections and iframe on the resource page, feel free to update.
• Added the rt-me-fMRI dataset link to the list of open datasets.

[codecov]

Codecov Report

Merging #745 (d67f3ed) into main (4f4e5dc) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main     #745   +/-   ##
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  Coverage   92.66%   92.66%           
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  Files          27       27           
  Lines        2139     2139           
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  Hits         1982     1982           
  Misses        157      157           

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[tsalo]

Everything looks great in the rendered documentation. Thanks!

[eurunuela]

Thank you @jsheunis !