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>

eslint.config.ts

@@ -574,7 +574,6 @@ export default defineConfig([
       'no-restricted-properties': [2, ...restrictedProperties],
       'no-restricted-imports': [2, {paths: [
         {name: 'jquery', message: 'Use the global $ instead', allowTypeImports: true},
-        {name: 'htmx.org', message: 'Use the global htmx instead', allowTypeImports: true},
       ]}],
       'no-restricted-syntax': [2, 'WithStatement', 'ForInStatement', 'LabeledStatement', 'SequenceExpression'],
       'no-return-assign': [0],
@@ -1021,6 +1020,6 @@ export default defineConfig([
   },
   {
     files: ['web_src/**/*'],
-    languageOptions: {globals: {...globals.browser, ...globals.jquery, htmx: false}},
+    languageOptions: {globals: {...globals.browser, ...globals.jquery}},
   },
 ]);