refactor(ivy): make all directives public by default (#25291)

To match the View Engine behavior.

We should make this configurable so that the node injector is tree shaken when
directives do not need to be published.

PR Close #25291

packages/compiler/src/render3/r3_identifiers.ts

@@ -158,6 +158,8 @@ export class Identifiers {
   static InheritDefinitionFeature:
       o.ExternalReference = {name: 'ɵInheritDefinitionFeature', moduleName: CORE};
 
+  static PublicFeature: o.ExternalReference = {name: 'ɵPublicFeature', moduleName: CORE};
+
   static listener: o.ExternalReference = {name: 'ɵL', moduleName: CORE};
 
   // Reserve slots for pure functions

packages/compiler/src/render3/view/compiler.ts

@@ -67,6 +67,9 @@ function baseDirectiveFields(
   // e.g. `features: [NgOnChangesFeature]`
   const features: o.Expression[] = [];
 
+  // TODO: add `PublicFeature` so that directives get registered to the DI - make this configurable
+  features.push(o.importExpr(R3.PublicFeature));
+
   if (meta.usesInheritance) {
     features.push(o.importExpr(R3.InheritDefinitionFeature));
   }