community: Add PolygonAggregates tool (#18882)

**Description:**
In this PR, I am adding a `PolygonAggregates` tool, which can be used to
get historical stock price data (called aggregates by Polygon) for a
given ticker.

Polygon
[docs](https://polygon.io/docs/stocks/get_v2_aggs_ticker__stocksticker__range__multiplier___timespan___from___to)
for this endpoint.

**Twitter**: 
[@virattt](https://twitter.com/virattt)

libs/community/langchain_community/agent_toolkits/polygon/toolkit.py

@@ -3,6 +3,7 @@ from typing import List
 from langchain_community.agent_toolkits.base import BaseToolkit
 from langchain_community.tools import BaseTool
 from langchain_community.tools.polygon import (
+    PolygonAggregates,
     PolygonFinancials,
     PolygonLastQuote,
     PolygonTickerNews,
@@ -20,6 +21,9 @@ class PolygonToolkit(BaseToolkit):
         cls, polygon_api_wrapper: PolygonAPIWrapper
     ) -> "PolygonToolkit":
         tools = [
+            PolygonAggregates(
+                api_wrapper=polygon_api_wrapper,
+            ),
             PolygonLastQuote(
                 api_wrapper=polygon_api_wrapper,
             ),