Refactoring: move all code files into a src directory

src/Logic/FeatureSource/FeatureSource.ts

@@ -0,0 +1,24 @@
+import { Store, UIEventSource } from "../UIEventSource"
+import FilteredLayer from "../../Models/FilteredLayer"
+import { Feature } from "geojson"
+
+export interface FeatureSource<T extends Feature = Feature> {
+    features: Store<T[]>
+}
+export interface WritableFeatureSource<T extends Feature = Feature> extends FeatureSource<T> {
+    features: UIEventSource<T[]>
+}
+
+/**
+ * A feature source which only contains features for the defined layer
+ */
+export interface FeatureSourceForLayer<T extends Feature = Feature> extends FeatureSource<T> {
+    readonly layer: FilteredLayer
+}
+
+/**
+ * A feature source which is aware of the indexes it contains
+ */
+export interface IndexedFeatureSource extends FeatureSource {
+    readonly featuresById: Store<Map<string, Feature>>
+}