feat(docs-infra): add useful links if landed on 404 page and no search results found (#34978)

Added additional links which can help user find the things they are
looking for when there are no search results (when searching or on a 404
page).

Note:
This commit increases the main bundle's payload size due to the extra
content of the `aio-search-results` component.

Fixes #31532

PR Close #34978

aio/scripts/_payload-limits.json

@@ -3,7 +3,7 @@
     "master": {
       "uncompressed": {
         "runtime-es2015": 2987,
-        "main-es2015": 449683,
+        "main-es2015": 450612,
         "polyfills-es2015": 52195
       }
     }
@@ -12,7 +12,7 @@
     "master": {
       "uncompressed": {
         "runtime-es2015": 2987,
-        "main-es2015": 450541,
+        "main-es2015": 451469,
         "polyfills-es2015": 52195
       }
     }
@@ -21,7 +21,7 @@
     "master": {
       "uncompressed": {
         "runtime-es2015": 3097,
-        "main-es2015": 427026,
+        "main-es2015": 429230,
         "polyfills-es2015": 52195
       }
     }