Anchor on a specific attribute

Feature request originally from @joshspicer

eg: send https://containers.dev/implementors/json_reference/#remoteEnv , which anchors the screen on the remoteEnv attribute

I manually added links to make each header clickable (i.e. https://containers.dev/implementors/json_reference/#image-specific) - it seems making these individual attributes into links is possible but would be quite time-consuming (there are many attributes, need to make each one into a unique link).

Start at the JSON reference page linked in the issue and inspect how its attribute headings are produced. Add unique anchors so links can target each attribute, then verify that the remoteEnv and image-specific examples land on their corresponding headings and that the attribute links work consistently.

索引モデルが issue の本文から書いたものです。