feat: Look for opencpn extensions to GPX (#129)

* Look for opencpn extensions to GPX

- Refs #128

* Try handling all extensions

* Trim contents, add gpxx by default

* Biome format lib

* Make formatting similar to main branch

* Move biome to devDependencies

* v6.0.0-0

biome.json

@@ -0,0 +1,31 @@
+{
+  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
+  "vcs": {
+    "enabled": false,
+    "clientKind": "git",
+    "useIgnoreFile": false
+  },
+  "files": {
+    "ignoreUnknown": false,
+    "ignore": []
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space"
+  },
+  "organizeImports": {
+    "enabled": true
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "double",
+      "trailingCommas": "es5"
+    }
+  }
+}