refactor(core): let reactive node prototypes conform to their type (#51722) (#51772)

This commit adds explicit type annotations to the reactive node prototype objects,
such that the prototypes are type-checked against the interface they are supposed
to (partially) implement. This also allows IDEs to better track usages of reactive
node properties, improving code navigation.

PR Close #51722

PR Close #51772

packages/core/src/render3/reactive_lview_consumer.ts

@@ -57,7 +57,7 @@ export function commitLViewConsumerIfHasProducers(
   currentConsumer = createLViewConsumer();
 }
 
-const REACTIVE_LVIEW_CONSUMER_NODE = {
+const REACTIVE_LVIEW_CONSUMER_NODE: ReactiveLViewConsumer = {
   ...REACTIVE_NODE,
   consumerIsAlwaysLive: true,
   consumerMarkedDirty: (node: ReactiveLViewConsumer) => {

packages/core/src/signals/src/graph.ts

@@ -26,7 +26,7 @@ export function setActiveConsumer(consumer: ReactiveNode|null): ReactiveNode|nul
   return prev;
 }
 
-export const REACTIVE_NODE = {
+export const REACTIVE_NODE: ReactiveNode = {
   version: 0 as Version,
   dirty: false,
   producerNode: undefined,

packages/core/src/signals/src/watch.ts

@@ -83,7 +83,7 @@ interface WatchNode extends ReactiveNode {
   ref: Watch;
 }
 
-const WATCH_NODE = {
+const WATCH_NODE: Partial<WatchNode> = {
   ...REACTIVE_NODE,
   consumerIsAlwaysLive: true,
   consumerAllowSignalWrites: false,