Remove htmx (#37224)

Close #35059

Slightly improved the "fetch action" framework and started adding tests for it.

---------

Signed-off-by: silverwind <me@silverwind.io>
Co-authored-by: silverwind <me@silverwind.io>

vite.config.ts

@@ -40,7 +40,6 @@ const webComponents = new Set([
 
 const commonRolldownOptions: Rolldown.RolldownOptions = {
   checks: {
-    eval: false, // htmx needs eval
     pluginTimings: false,
   },
 };