Initial commit

Half-baked state. Most of the UI is mostly done, but the integration
with Grist (or any other data provider) is still missing.

providers/debug_data.gd

@@ -0,0 +1,16 @@
+extends Node
+
+func load_articles() -> Dictionary[String, ArticleInfo]:
+	var article_infos: Dictionary[String, ArticleInfo] = {}
+	
+	for i in range(10):
+		var id = "default_" + var_to_str(i)
+		var info = ArticleInfo.new(
+			id,
+			"Artikel " + var_to_str(i),
+			load("res://icon.svg"),
+			0.1 * i
+		)
+		article_infos[id] = info
+	
+	return article_infos