Add more playground presets (#543)

* Add more playground presets

* Fixes to Trampoline/Painted Playground Map presets

* Use `temaki-compass` icon for `playground=map` as suggested
* Remove `line` geometry from `playground=map`
* Rename `playground=trampoline` preset to just 'Trampoline'

* Distinguish between pitch/playground

for funnel ball/tetherball

* Add Gaga Pit preset

* Add terms to Gaga Pit preset

* Use for specific icons

* fix tag of subject/wikidata field

* Update data/presets/playground/map.json

Co-authored-by: Martin Raifer <martin@raifer.tech>

Co-authored-by: Martin Raifer <martin@raifer.tech>

data/fields/subject.json

@@ -0,0 +1,5 @@
+{
+    "key": "subject",
+    "type": "text",
+    "label": "Subject"
+}

data/fields/subject/wikidata.json

@@ -0,0 +1,9 @@
+{
+    "key": "subject:wikidata",
+    "keys": [
+        "subject:wikidata",
+        "subject:wikipedia"
+    ],
+    "type": "wikidata",
+    "label": "Subject Wikidata"
+}