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>

templates/repo/actions/workflow_dispatch_inputs.tmpl

@@ -12,14 +12,12 @@
 		<div class="ui field {{if .Required}}required{{end}}">
 			{{if eq .Type "choice"}}
 				<label>{{or .Description .Name}}:</label>
-				{{/* htmx won't initialize the fomantic dropdown, so it is a standard "select" input */}}
 				<select class="ui selection dropdown" name="{{.Name}}">
 					{{range .Options}}
 						<option value="{{.}}" {{if eq $item.Default .}}selected{{end}}>{{.}}</option>
 					{{end}}
 				</select>
 			{{else if eq .Type "boolean"}}
-				{{/* htmx doesn't trigger our JS code to attach fomantic label to checkbox, so here we use standard checkbox */}}
 				<label class="tw-flex flex-text-inline">
 					<input type="checkbox" name="{{.Name}}" {{if eq .Default "true"}}checked{{end}}>
 					{{or .Description .Name}}