feat: 导入 NMEA-0183 GPS 协议解析库（node-nmea）

NMEA-0183 语句解析器，含 21 个语句类型 codec 与配套单元测试。

- codecs/：APB/BWC/DBT/GGA/GLL/GRMT/GSA/GSV/HDG/HDM/HDT/MWV/RDID/
  RMB/RMC/ROT/RSA/TXT/VTG/VWR/ZDA
- test/：各 codec 对应的 mocha 用例
- .github/workflows/：node与 npm-publish 流水线

许可证：MIT（原作者 James Penn）

codecs/HDT.js

@@ -0,0 +1,34 @@
+var helpers = require("../helpers.js")
+/*
+ === HDT - Heading - True ===
+
+ ------------------------------------------------------------------------------
+        1   2 3
+        |   | |
+ $--HDT,x.x,T*hh
+ ------------------------------------------------------------------------------
+
+ Field Number:
+
+ 1) Heading Degrees, true
+ 2) T = True
+ 3) Checksum
+ */
+exports.TYPE = 'heading-info';
+exports.ID = 'HDT';
+
+exports.decode = function (fields) {
+  return {
+    sentence: exports.ID,
+    type: 'heading-info',
+    heading: +fields[1]
+  }
+};
+
+exports.encode = function (talker, msg) {
+  var result = ['$' + talker + exports.ID];
+  result.push(helpers.encodeFixed(msg.heading, 1));
+  result.push('T');
+  var resultMsg = result.join(',');
+  return resultMsg + helpers.computeChecksum(resultMsg);
+};