chore: Adds .vscode folder.

.vscode/extensions.json

@@ -0,0 +1,10 @@
+{
+  "recommendations": [
+    "bbenoist.Nix",
+    "Prisma.prisma",
+
+    "rust-lang.rust-analyzer",
+    "tamasfe.even-better-toml",
+    "dustypomerleau.rust-syntax",
+  ]
+}

.vscode/settings.json

@@ -0,0 +1,15 @@
+{
+  "[rust]": {
+    "editor.tabSize": 4
+  },
+
+  "[typescript]": {
+    "editor.tabSize": 2
+  },
+
+  "[javascript]": {
+    "editor.tabSize": 2
+  },
+
+  "rust-analyzer.linkedProjects": ["./gui/Cargo.toml"]
+}