Finish dark.ts initial port and restructure files to get ready for build script

Build script currently fails to type check. Not sure whats going on. Will fix in the morning.

Co-authored-by: Nate Butler <nate@zed.dev>

styles/styleTree/selectorModal.ts

@@ -0,0 +1,59 @@
+import { backgroundColor, border, player, shadow, text } from "./components";
+import Theme from "./theme";
+
+export default function selectorModal(theme: Theme): Object {
+  const item = {
+    padding: {
+      bottom: 4,
+      left: 16,
+      right: 16,
+      top: 4,
+    },
+    cornerRadius: 6,
+    text: text(theme, "sans", "secondary"),
+    highlightText: text(theme, "sans", "feature", { weight: "bold" }),
+  };
+
+  const activeItem = {
+    ...item,
+    background: backgroundColor(theme, 500, "active"),
+    text: text(theme, "sans", "primary"),
+  };
+
+  return {
+    background: backgroundColor(theme, 500),
+    cornerRadius: 6,
+    padding: 8,
+    item,
+    activeItem,
+    border: border(theme, "primary"),
+    empty: {
+      text: text(theme, "sans", "muted"),
+      padding: {
+        bottom: 4,
+        left: 16,
+        right: 16,
+        top: 8,
+      },
+    },
+    inputEditor: {
+      background: backgroundColor(theme, 300),
+      corner_radius: 6,
+      placeholderText: text(theme, "sans", "placeholder"),
+      selection: player(theme, 1).selection,
+      text: text(theme, "mono", "primary"),
+      border: border(theme, "primary"),
+      padding: {
+        bottom: 7,
+        left: 16,
+        right: 16,
+        top: 7,
+      },
+    },
+    margin: {
+      bottom: 52,
+      top: 52,
+    },
+    shadow: shadow(theme),
+  };
+}