Now that we have support for plugins that can write I'm seeing all sorts of places where a plugin might need to add UI to the table page.

Some examples:

• datasette-configure-fts needs to add a "configure search for this table" link
• a plugin that lets you render or delete tables needs to add a link or button somewhere
• existing plugins like datasette-vega and datasette-cluster-map already do this with JavaScript

The challenge here is that multiple plugins may want to do this, so simply overriding templates and populating names blocks doesn't entirely work as templates may override each other.