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）

test/GGAtest.js

@@ -0,0 +1,44 @@
+var should = require('should');
+
+describe('GGA ', function () {
+  it('parses', function () {
+    var msg = require("../nmea.js").parse("$IIGGA,123519,4807.04,N,1131.00,E,1,8,0.9,545.9,M,46.9,M,,*52");
+    msg.should.have.property('type', 'fix');
+    msg.should.have.property('sentence', 'GGA');
+    msg.should.have.property('talker_id', 'II');
+    msg.should.have.property('timestamp', '123519');
+    msg.should.have.property('lat', '4807.04');
+    msg.should.have.property('latPole', 'N');
+    msg.should.have.property('lon', '1131.00');
+    msg.should.have.property('lonPole', 'E');
+    msg.should.have.property('fixType', 'fix');
+    msg.should.have.property('numSat', 8);
+    msg.should.have.property('horDilution', 0.9);
+    msg.should.have.property('alt', 545.9);
+    msg.should.have.property('altUnit', 'M');
+    msg.should.have.property('geoidalSep', 46.9);
+    msg.should.have.property('geoidalSepUnit', 'M');
+  });
+});
+
+
+describe('GGA', function () {
+  it('encodes ok', function () {
+    var nmeaMsg = require("../nmea.js").encode('II', {
+      type: 'fix',
+      timestamp: new Date(Date.UTC(2013, 1, 1, 12, 35, 19)),
+      lat: 4807.04, 
+      latPole: 'N',
+      lon: 1131.00, 
+      lonPole: 'E',
+      fixType: 'fix',
+      numSat: 8,
+      horDilution: 0.9,
+      alt: 545.9,
+      altUnit: 'M',
+      geoidalSep: 46.9,
+      geoidalSepUnit: 'M'
+    });
+    nmeaMsg.should.equal("$IIGGA,123519,4807.04,N,1131.00,E,1,8,0.9,545.9,M,46.9,M,,*52");
+  });
+});