Add field for annotating unresolvable ontologies, update OLS processing, and better annotate HPATH

[cthoyt]

Closes #927

This PR does the following:

• [x] Adds a new boolean field uri_format_resolvable so we can explicitly annotate when URI format strings are known to not be resolvable
• [x] Adds a note on to the page for a resource when this flag is set to true
• [x] Updates OLS download processing to more carefully annotate if the download is OWL, OBO, RDF, or other

[codecov[bot]]

Codecov Report

Attention: 11 lines in your changes are missing coverage. Please review.

Comparison is base (d0292d2) 40.93% compared to head (3861523) 40.89%. Report is 4 commits behind head on main.

Files	Patch %	Lines
src/bioregistry/external/ols.py	0.00%	11 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #993 +/- ## ========================================== - Coverage 40.93% 40.89% -0.05% ========================================== Files 138 138 Lines 7905 7916 +11 Branches 1841 1845 +4 ========================================== + Hits 3236 3237 +1 - Misses 4467 4477 +10 Partials 202 202 ```

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