Added Masthead, CMDPalette and PostHeader Components

package.json

@@ -10,15 +10,18 @@
   "dependencies": {
     "@astrojs/markdoc": "^0.12.9",
     "@astrojs/node": "^9.5.4",
+    "@astrojs/preact": "^4.1.3",
     "@astrojs/react": "^4.2.0",
     "@fontsource-variable/geist": "^5.2.8",
     "@fontsource-variable/geist-mono": "^5.2.7",
     "@fontsource/blaka": "^5.2.7",
+    "@keystar/ui": "^0.7.19",
     "@keystatic/astro": "^5.0.6",
     "@keystatic/core": "^0.5.48",
     "@types/react": "^19.0.8",
     "@types/react-dom": "^19.0.3",
     "astro": "^5.2.5",
+    "preact": "^10.28.4",
     "react": "^19.0.0",
     "react-dom": "^19.0.0"
   },
@@ -35,11 +38,16 @@
     "@typescript-eslint/parser": "^8.56.0",
     "eslint": "^10.0.0",
     "eslint-plugin-astro": "^1.6.0",
+    "postcss-html": "^1.8.1",
     "postcss-import": "^16.1.1",
+    "postcss-mixins": "^12.1.2",
     "postcss-preset-env": "^11.1.3",
     "prettier": "^3.8.1",
     "prettier-plugin-astro": "^0.14.1",
     "stylelint": "^17.3.0",
+    "stylelint-config-astro": "^2.0.0",
+    "stylelint-config-clean-order": "^8.0.1",
+    "stylelint-config-html": "^1.1.0",
     "stylelint-config-standard": "^40.0.0",
     "stylelint-order": "^7.0.1"
   }