Fix #972 [Docs]: Add Readme.md to packages/rrweb (#1025)

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Copy the README.md from source folder, change link dependencies

* Update README.md

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* Update README.md

fix the typo

* Update README.md: formatting using prettier

packages/rrweb/README.md

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+<p align="center">
+  <img width="100px" height="100px" src="https://www.rrweb.io/favicon.png">
+</p>
+<p align="center">
+  <a href="https://www.rrweb.io/" style="font-weight: bold">Try rrweb</a>
+</p>
+
+# rrweb
+
+**This is a simpler version of the [original rrewb README](../../README.md) within this rrweb subpackage**
+
+[中文文档](../../README.zh_CN.md)
+
+rrweb refers to 'record and replay the web', which is a tool for recording and replaying users' interactions on the web.
+
+## Guide
+
+[**📚 Read the rrweb guide here. 📚**](../../guide.md)
+
+[**🍳 Recipes 🍳**](../../docs/recipes/index.md)
+
+## Project Structure
+
+**[rrweb](https://github.com/rrweb-io/rrweb)** mainly includes two funtions:
+
+- **Record**: The record function is used to record all the mutations in the DOM
+- **Replay**: The replay function is to replay the recorded mutations one by one according to the corresponding timestamp.
+
+## Roadmap
+
+- rrdom: an ad-hoc DOM for rrweb session data [#419](https://github.com/rrweb-io/rrweb/issues/419)
+- storage engine: do deduplication on a large number of rrweb sessions
+- more end-to-end tests
+- compact mutation data in common patterns
+- provide plugins via the new plugin API, including:
+  - XHR plugin
+  - fetch plugin
+  - GraphQL plugin
+  - ...
+
+## Internal Design
+
+- [serialization](../../docs/serialization.md)
+- [incremental snapshot](../../docs/observer.md)
+- [replay](../../docs/replay.md)
+- [sandbox](../../docs/sandbox.md)
+
+## Contribute Guide
+
+Since we want the record and replay sides to share a strongly typed data structure, rrweb is developed with typescript which provides stronger type support.
+
+[Typescript handbook](https://www.typescriptlang.org/docs/handbook/declaration-files/introduction.html)
+
+1. Fork this repository.
+2. Run `yarn install` in the root to install required dependencies for all sub-packages (note: `npm install` is _not_ recommended).
+3. Run `yarn dev` in the root to get auto-building for all the sub-packages whenever you modify anything.
+4. Navigate to one of the sub-packages (in the `packages` folder) where you'd like to make a change.
+5. Patch the code and run `yarn test` to run the tests, make sure they pass before you commit anything.
+6. Push the code and create a pull request.
+
+Protip: You can run `yarn test` in the root folder to run all the tests.
+
+In addition to adding integration tests and unit tests, rrweb also provides a REPL testing tool.
+
+[Using the REPL tool](../../guide.md#REPL-tool)
+
+## Core Team Members
+
+<table>
+  <tr>
+    <td align="center">
+      <a href="https://github.com/Yuyz0112">
+        <img
+          src="https://avatars.githubusercontent.com/u/13651389?s=100"
+          width="100px;"
+          alt=""
+        />
+        <br /><sub><b>Yuyz0112</b></sub>
+      </a>
+    </td>
+    <td align="center">
+      <a href="https://github.com/Mark-Fenng">
+        <img
+          src="https://avatars.githubusercontent.com/u/27533910?s=100"
+          width="100px;"
+          alt=""
+        />
+        <br /><sub><b>Mark-Fenng</b></sub>
+      </a>
+    </td>
+    <td align="center">
+      <a href="https://github.com/eoghanmurray">
+        <img
+          src="https://avatars.githubusercontent.com/u/156780?s=100"
+          width="100px;"
+          alt=""
+        />
+        <br /><sub><b>eoghanmurray</b></sub>
+      </a>
+    </td>
+    <td align="center">
+      <a href="https://github.com/Juice10">
+        <img
+          src="https://avatars.githubusercontent.com/u/4106?s=100"
+          width="100px;"
+          alt=""
+        />
+        <br /><sub><b>Juice10</b></sub>
+      </a>
+    </td>
+  </tr>
+</table>
+
+## Who's using rrweb
+
+<table>
+  <tr>
+    <td align="center">
+      <a href="http://www.smartx.com/" target="_blank">
+        <img width="195px" src="https://www.rrweb.io/logos/smartx.png">
+      </a>
+    </td>
+    <td align="center">
+      <a href="https://posthog.com?utm_source=rrweb&utm_medium=sponsorship&utm_campaign=open-source-sponsorship" target="_blank">
+        <img width="195px" src="https://www.rrweb.io/logos/posthog.png">
+      </a>
+    </td>
+    <td align="center">
+      <a href="https://statcounter.com/session-replay/" target="_blank">
+        <img width="195px" src="https://statcounter.com/images/logo-statcounter-arc-blue.svg">
+      </a>
+    </td>
+    <td align="center">
+      <a href="https://cux.io" target="_blank">
+        <img style="padding: 8px" alt="The first ever UX automation tool" width="195px" src="https://static.cux.io/logo.svg">
+      </a>
+    </td>
+  </tr>
+    <tr>
+    <td align="center">
+      <a href="https://recordonce.com/" target="_blank">
+        <img width="195px" src="https://uploads-ssl.webflow.com/5f3d133183156245630d4446/5f3d1940abe8db8612c23521_Record-Once-logo-554x80px.svg">
+      </a>
+    </td>
+    <td align="center">
+      <a href="https://remsupp.com" target="_blank">
+        <img style="padding: 8px" alt="Remote Access & Co-Browsing" width="195px" src="https://remsupp.com/images/logo.png">
+      </a>
+    </td>
+  </tr>
+</table>