add a shortcut to speed up local ts dev

@hgiesel if you're not already doing something like this, you might
find this useful

qt/aqt/mediasrv.py

@@ -27,6 +27,7 @@ from aqt.utils import aqt_data_folder
 
 
 def _getExportFolder() -> str:
+    if not (data_folder := os.getenv("ANKI_DATA_FOLDER")):
         data_folder = aqt_data_folder()
     webInSrcFolder = os.path.abspath(os.path.join(data_folder, "web"))
     if os.path.exists(webInSrcFolder):

scripts/ts-run

@@ -0,0 +1,10 @@
+#!/bin/bash
+#
+# Start Anki with the data folder pointed at bazel-bin,
+# which is useful when developing TS pages on a Mac.
+#
+# The pages can be accessed by, eg surfing to
+# http://localhost:40000/_anki/pages/deckconfig.html
+
+ANKI_DATA_FOLDER=$(pwd)/bazel-bin/qt/aqt/data \
+  ANKI_API_PORT=40000 ANKIDEV=1 ./run

scripts/ts-watch

@@ -0,0 +1,13 @@
+#!/bin/bash
+#
+# Monitor the ts folder and rebuild aqt's data each time
+# it changes, for testing pages locally.
+#
+# On a Mac, useful to combine with ts-run.
+
+# run once at startup
+cmd='printf \\033c\\n; bazel build qt:runanki'
+sh -c "$cmd"
+
+# then monitor for changes
+fswatch -r -o ts | xargs -n1 -I{} sh -c "$cmd"