Fix issues with camera rotation

This commit fixes at least these issues that I was aware of:
* Cardinal directions (e.g. NE) were not recognized.
* The camera icon did not rotatie when direction=* was used instead of
  camera:direction, but the blue direction visualizer did.

Pietervdvn said he would have liked to convert the code for direction
normalizing to calculatedTags in a JSON file (as documented in
Docs/CalculatedTags.md), but when he saw the oneliners I had to produce
in response, I was allowed to keep it in SimpleMetaTagger.ts for now.
For your amusement, the oneliners are included below.

    "calculatedTags": [
      "_direction:numerical=(dir => dir === undefined ? undefined : ({N: 0, NNE: 22.5, NE: 45, ENE: 67.5, E: 90, ESE: 112.5, SE: 135, SSE: 157.5, S: 180, SSW: 202.5, SW: 225, WSW: 247.5, W: 270, WNW: 292.5, NW: 315, NNW: 337.5}[dir] ?? (isNaN(parseFloat(dir)) ? undefined : ((parseFloat(dir) % 360 + 360) % 360)))))(feat.properties['camera:direction'] ?? feat.properties.direction)",
      "_direction:leftright=feat.properties['_direction:numerical'] === undefined ? undefined : (feat.properties['_direction:numerical'] <= 180 ? 'right' : 'left')"
    ]

assets/layers/direction/direction.json

@@ -32,17 +32,11 @@
     ]
   },
   "rotation": {
-    "render": "{camera:direction}deg",
-    "mappings": [
-      {
-        "if": "direction~*",
-        "then": "{direction}deg"
-      }
-    ]
+    "render": "{_direction:numerical}deg"
   },
   "iconSize": "200,200,center",
   "color": "--catch-detail-color",
   "stroke": "0",
   "presets": [],
   "wayHandling": 2
-}
+}