docs: fix 404 for names with dashes in docs

[tlambert03]

fixes #98 (which was caused by a faulty check for whether a name was an alias during building of the docs). The workaround is to prevent any keys with dashes in the record.json files. This is somewhat hacky, but I added a warning for now which will fail tests if another dashed name is added in the future. If we really need dashed keys in record.json, we can fix it later

[codecov]

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #99   +/-   ##
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  Coverage        ?   96.36%           
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  Files           ?      166           
  Lines           ?     2147           
  Branches        ?        0           
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  Hits            ?     2069           
  Misses          ?       78           
  Partials        ?        0           

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