✨ feat：implement '@algorithm.ts/huffman'

Author: guanghechen

Diff for: packages/huffman/README.md

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+<header>
+  <h1 align="center">
+    <a href="https://github.com/guanghechen/algorithm.ts/tree/main/packages/huffman#readme">@algorithm.ts/huffman</a>
+  </h1>
+  <div align="center">
+    <a href="https://www.npmjs.com/package/@algorithm.ts/huffman">
+      <img
+        alt="Npm Version"
+        src="https://img.shields.io/npm/v/@algorithm.ts/huffman.svg"
+      />
+    </a>
+    <a href="https://www.npmjs.com/package/@algorithm.ts/huffman">
+      <img
+        alt="Npm Download"
+        src="https://img.shields.io/npm/dm/@algorithm.ts/huffman.svg"
+      />
+    </a>
+    <a href="https://www.npmjs.com/package/@algorithm.ts/huffman">
+      <img
+        alt="Npm License"
+        src="https://img.shields.io/npm/l/@algorithm.ts/huffman.svg"
+      />
+    </a>
+    <a href="#install">
+      <img
+        alt="Module Formats: cjs, esm"
+        src="https://img.shields.io/badge/module_formats-cjs%2C%20esm-green.svg"
+      />
+    </a>
+    <a href="https://github.com/nodejs/node">
+      <img
+        alt="Node.js Version"
+        src="https://img.shields.io/node/v/@algorithm.ts/huffman"
+      />
+    </a>
+    <a href="https://github.com/facebook/jest">
+      <img
+        alt="Tested with Jest"
+        src="https://img.shields.io/badge/tested_with-jest-9c465e.svg"
+      />
+    </a>
+    <a href="https://github.com/prettier/prettier">
+      <img
+        alt="Code Style: prettier"
+        src="https://img.shields.io/badge/code_style-prettier-ff69b4.svg?style=flat-square"
+      />
+    </a>
+  </div>
+</header>
+<br/>
+
+
+A typescript implementation of the **huffman** coding.
+
+
+## Install
+
+* npm
+
+  ```bash
+  npm install --save @algorithm.ts/huffman
+  ```
+
+* yarn
+
+  ```bash
+  yarn add @algorithm.ts/huffman
+  ```
+
+
+## Usage
+
+* `encode`: Encode text to Uint8Array and a huffman tree.
+
+  ```typescript
+  import { encode } from '@algorithm.ts/huffman'
+
+  const { encodedData, encodingTable, tree } = encode('Hello, world!')
+  ```
+
+* `decode`: Decode a huffman encoded data to string.
+
+  ```typescript
+  import { decode } from '@algorithm.ts/huffman'
+
+  const plaintext = decode(encodedData, tree)
+
+  // Or build tree from encodingTable
+  const tree2 = buildHuffmanTree(encodingTable)
+  const plaintext2 = decode(encodedData, tree2)
+  ```
+
+* `compress`: Compress the encoded data.
+
+  ```typescript
+  // Array<0 | 1> ==> Uint8Array
+  const compressedData = compress(encodedData)
+  ```
+
+* `decompress`: Decompress data.
+
+  ```typescript
+  // Uint8Array ==> Array<0 | 1>
+  const encodedData2 = decompress(compressedData)
+  ```
+
+
+## Related
+
+* [Huffman coding | Wikipedia](https://en.wikipedia.org/wiki/Huffman_coding)
+
+
+[homepage]: https://github.com/guanghechen/algorithm.ts/tree/main/packages/huffman#readme