add extention recomandations

change default css to postcss

.vscode/extensions.json

@@ -0,0 +1,12 @@
+{
+    "recommendations": [
+        "a-h.templ",
+        "golang.go",
+        "azizziy.oklch-as",
+        "bradlc.vscode-tailwindcss",
+        "csstools.postcss",
+        "adrianwilczynski.alpine-js-intellisense",
+        "ms-vscode.makefile-tools",
+        "tombi-toml.tombi"
+    ]
+}