Add architecture diagram files and One Dark Pro theme extension

Author: shakil1819

.idx/dev.nix

@@ -41,6 +41,7 @@
     # Search for the extensions you want on https://open-vsx.org/ and use "publisher.id"
     extensions = [
       # "vscodevim.vim"
+      "zhuangtongfa.material-theme"
       "GitHub.vscode-pull-request-github"
       "GitHub.vscode-github-actions"
       "ms-edgedevtools.vscode-edge-devtools"

app/diagram/arch.dio

@@ -0,0 +1,10 @@
+<mxfile host="65bd71144e">
+    <diagram id="-LFnye-GJGIvqDYZrd8t" name="Page-1">
+        <mxGraphModel dx="1055" dy="480" grid="0" gridSize="10" guides="1" tooltips="1" connect="1" arrows="1" fold="1" page="1" pageScale="1" pageWidth="850" pageHeight="1100" math="0" shadow="0">
+            <root>
+                <mxCell id="0"/>
+                <mxCell id="1" parent="0"/>
+            </root>
+        </mxGraphModel>
+    </diagram>
+</mxfile>

app/diagram/arch.excalidraw

@@ -0,0 +1,11 @@
+{
+  "type": "excalidraw",
+  "version": 2,
+  "source": "https://marketplace.visualstudio.com/items?itemName=pomdtr.excalidraw-editor",
+  "elements": [],
+  "appState": {
+    "gridSize": null,
+    "viewBackgroundColor": "#ffffff"
+  },
+  "files": {}
+}