docs(chore): docs update

docs update

BREAKING CHANGE:
YES

GH-99

Author: vaibhavbhalla2505

src/decorators/consumer.decorator.ts

@@ -2,6 +2,13 @@ import {Constructor, injectable} from '@loopback/core';
 import {asConsumer} from '../keys';
 import {IConsumer, IStreamDefinition} from '../types';
 
+/**
+ * The `consumer` function in TypeScript is a generic function that returns an injectable consumer for
+ * a specific stream definition and message type.
+ * @returns The `consumer` function is returning a function that takes a target constructor of type
+ * `IConsumer<T, E>` and does some operation on it. The specific operation being performed is not clear
+ * from the provided code snippet.
+ */
 export function consumer<
   T extends IStreamDefinition,
   E extends keyof T['messages'],