add basic ItemSheet

src/main.css

@@ -0,0 +1,21 @@
+.item-sheet header {
+    display: flex;
+    flex-flow: row wrap;
+    justify-content: flex-start;
+    align-items: center;
+}
+
+.item-sheet header img {
+    flex: 0 0 64px;
+    height: 64px;
+    margin-right: 6px;
+}
+
+.item-sheet header input,
+.item-sheet header div {
+    flex: 1;
+    height: 48px;
+    line-height: 48px;
+    margin: 8px;
+    font-size: 2em;
+}

src/main.mjs

@@ -1,14 +1,43 @@
-console.log("Hello World! This code runs immediately when the file is loaded.");
-
 function init() {
     console.log("INIT");
-    console.log(foundry.documents.BaseItem.metadata.types);
-    foundry.documents.BaseItem.metadata.types.push("talent");
+
+    //DocumentSheetConfig.unregisterSheet(Item, "core", ItemSheet);
+    DocumentSheetConfig.registerSheet(Item, "dsa41", DSA41_ItemSheet, { 
+            makeDefault: true, 
+            types: [
+                "Generic Item",
+                "Melee Weapon",
+                "Ranged Weapon",
+                "Armor",
+                "Shield",
+            ] 
+        }
+    );
+}
+
+class DSA41_ItemSheet extends ItemSheet {
+    get template() {
+        return "systems/dsa-4th-edition/ItemSheets/" + this.item.type + ".html"
+    }
+
+
+    getData() {
+        const data = super.getData();
+        console.log(data);
+        return data;
+    }
+
 }
 
 function ready() {
     console.log("READY");
 }
 
-Hooks.on("init", init);
-Hooks.on("ready", ready);
+function setup() {
+    console.log("SETUP");
+    //Item.create({"name": "TestItem4", "type": "spell", "system": {"price": "15"}});
+}
+
+Hooks.once("init", init);
+Hooks.once("ready", ready);
+Hooks.once("setup", setup);