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/APB.js

@@ -0,0 +1,58 @@
+exports.ID = 'APB';
+exports.TYPE = 'autopilot-b';
+
+exports.decode = function(fields) {
+  /*
+   === APB - Autopilot Sentence "B" ===
+
+   13    15
+   ------------------------------------------------------------------------------
+   1 2 3   4 5 6 7 8   9 10   11  12|   14|
+   | | |   | | | | |   | |    |   | |   | |
+   $--APB,A,A,x.x,a,N,A,A,x.x,a,c--c,x.x,a,x.x,a*hh<CR><LF>
+   ------------------------------------------------------------------------------
+
+   Field Number:
+
+   1. Status
+   V = LORAN-C Blink or SNR warning
+   V = general warning flag or other navigation systems when a reliable
+   fix is not available
+   2. Status
+   V = Loran-C Cycle Lock warning flag
+   A = OK or not used
+   3. Cross Track Error Magnitude
+   4. Direction to steer, L or R
+   5. Cross Track Units, N = Nautical Miles
+   6. Status
+   A = Arrival Circle Entered
+   7. Status
+   A = Perpendicular passed at waypoint
+   8. Bearing origin to destination
+   9. M = Magnetic, T = True
+   10. Destination Waypoint ID
+   11. Bearing, present position to Destination
+   12. M = Magnetic, T = True
+   13. Heading to steer to destination waypoint
+   14. M = Magnetic, T = True
+   15. Checksum
+   */
+  return {
+    sentence: exports.ID,
+    type: exports.TYPE,
+    status1 : fields[1],
+    status2 : fields[2],
+    xteMagn : +fields[3],
+    steerDir : fields[4],
+    xteUnit : fields[5],
+    arrivalCircleStatus : fields[6],
+    arrivalPerpendicularStatus : fields[7],
+    bearingOrig2Dest : +fields[8],
+    bearingOrig2DestType : fields[9],
+    waypoint : fields[10],
+    bearing2Dest : +fields[11],
+    bearingDestType : fields[12],
+    heading2steer : +fields[13],
+    headingDestType : fields[14]
+  }
+}