Plumb sourceLayer through setFeatureState, so hovering on vector tile

[dabreegster]

sources works.

I didn't change any example in this repo to demonstrate the problem or fix, because I don't have a pmtiles file in a stable place with feature IDs defined. My temporary diff for the pmtiles_source example used this:

+  import { hoverStateFilter } from '$lib/filters.ts';

   <VectorTileSource
-    url={'pmtiles://https://r2-public.protomaps.com/protomaps-sample-datasets/cb_2018_us_zcta510_500k.pmtiles'}
+    url={'pmtiles://https://atip.uk/layers/v1/wards.pmtiles'}
   > 
     <LineLayer
+      manageHoverState
       paint={{
         'line-opacity': 0.6,
         'line-color': 'rgb(53, 175, 109)',
-        'line-width': 2,
+        'line-width': hoverStateFilter(5, 10),
       }}
-      sourceLayer={'zcta'}
+      sourceLayer={'wards'}
     />
   </VectorTileSource>

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Latest commit: 1aea7fa2296a3f1df1665f45a56732a484ceb4b8

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