eslint-config: add version badge and add homepage for eslint-config (#28506)

Summary:
Add version badge to README of eslint-config, and add specific url for the homepage so people looking at the npm package can find out where the package is from.

## Changelog

[Internal] [Changed] - Add version badge to README of eslint-config
Pull Request resolved: https://github.com/facebook/react-native/pull/28506

Test Plan: Not required as the only changes are made in README and homepage prop of package.json

Differential Revision: D20837085

Pulled By: cpojer

fbshipit-source-id: 820d3b44b069780ec8764c6152d2e7fd5220933c

packages/eslint-config-react-native-community/README.md

@@ -1,5 +1,7 @@
 # eslint-config-react-native-community
 
+[![Version][version-badge]][package]
+
 ## Installation
 
 ```
@@ -17,3 +19,7 @@ Add to your eslint config (`.eslintrc`, or `eslintConfig` field in `package.json
     "extends": "@react-native-community"
 }
 ```
+
+[version-badge]: https://img.shields.io/npm/v/@react-native-community/eslint-config.svg?style=flat-square
+[package]: https://www.npmjs.com/package/@react-native-community/eslint-config
+

packages/eslint-config-react-native-community/package.json

@@ -8,6 +8,7 @@
     "type": "git",
     "url": "git@github.com:facebook/react-native.git"
   },
+  "homepage": "https://github.com/facebook/react-native/tree/master/packages/eslint-config-react-native-community#readme",
   "dependencies": {
     "@react-native-community/eslint-plugin": "^1.0.0",
     "@typescript-eslint/eslint-plugin": "^2.25.0",