Create no-nested-pipe.md

example in the docs about the growing code face issues with nested pipes for which we require this rule to avoid this complexity

Author: birenrao

docs/rules/no-nested-pipe.md

@@ -0,0 +1,40 @@
+# Avoid nested `pipe` calls (`no-nested-pipe`)
+
+This rule effects failures if `pipe` is called within a `pipe` handler.
+
+## Rule details
+
+Examples of **incorrect** code for this rule:
+
+```ts
+import { of, timer } from "rxjs";
+
+of("searchText1", "searchText2").pipe(switchMap((searchText) => {
+	return this.callSearchAPI(searchText).pipe(map(response => {
+               ......
+               ......
+// considering more lines here
+	})
+})
+```
+
+Examples of **correct** code for this rule:
+
+```ts
+import { of, timer } from "rxjs";
+import { mapTo, mergeMap } from "rxjs/operators";
+
+of("searchText1", "searchText2").pipe(switchMap((searchText) => this.getDisplayResponse(searchText)))
+ 
+function getDisplayResponse (){
+this.callSearchAPI(searchText).pipe(map(response => {
+               ......
+               ......
+ // considering more lines here
+}
+
+```
+
+## Options
+
+This rule has no options.