Restructure repo so the light variant installs as theme 'tintenblau'

omarchy-theme-install clones the repo into ~/.config/omarchy/themes/<name>
and omarchy-theme-set stages only the repo root. Moving the light variant
to the root makes 'omarchy theme install' produce a working theme; the dark
variant stays as tintenblau-dark/ subfolder.

vscode-extension/package.json

@@ -0,0 +1,22 @@
+{
+    "name": "theme-tintenblau",
+    "displayName": "Tintenblau Theme",
+    "description": "Tintenblau color theme",
+    "publisher": "local",
+    "version": "1.0.0",
+    "engines": {
+        "vscode": "^1.70.0"
+    },
+    "categories": [
+        "Themes"
+    ],
+    "contributes": {
+        "themes": [
+            {
+                "label": "Tintenblau",
+                "uiTheme": "vs",
+                "path": "./themes/tintenblau-color-theme.json"
+            }
+        ]
+    }
+}