Rewrite @turf/isobands (#2926)

* Reimplement @turf/isobands to clear up licensing issues around marchingsquares

* Add test case from issue #1084

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Co-authored-by: James Beard <[email protected]>

Author: mfedderly

packages/turf-isobands/index.ts

@@ -83,7 +83,6 @@
     "@turf/invariant": "workspace:*",
     "@turf/meta": "workspace:*",
     "@types/geojson": "^7946.0.10",
-    "marchingsquares": "^1.3.3",
     "tslib": "^2.8.1"
   }
 }