Linting, prettier and postcss setup

eslint.config.js

@@ -0,0 +1,56 @@
+// eslint.config.js
+import js from '@eslint/js'
+import typescriptParser from '@typescript-eslint/parser'
+import typescript from '@typescript-eslint/eslint-plugin'
+import astro from 'eslint-plugin-astro'
+import astroParser from 'astro-eslint-parser'
+import * as mdx from 'eslint-plugin-mdx' // Import everything
+import markdown from 'eslint-plugin-markdown'
+
+export default [
+  js.configs.recommended,
+  {
+    files: ['**/*.ts', '**/*.tsx'],
+    plugins: {
+      '@typescript-eslint': typescript
+    },
+    languageOptions: {
+      parser: typescriptParser
+    },
+    rules: {
+      ...typescript.configs.recommended.rules
+    }
+  },
+  {
+    files: ['**/*.astro'],
+    plugins: {
+      astro
+    },
+    languageOptions: {
+      parser: astroParser,
+      parserOptions: {
+        parser: typescriptParser,
+        extraFileExtensions: ['.astro']
+      }
+    },
+    rules: {
+      ...astro.configs.recommended.rules
+    }
+  },
+  {
+    files: ['**/*.mdx'],
+    plugins: {
+      mdx
+    },
+    rules: {
+      ...mdx.configs.recommended.rules
+    }
+  },
+  {
+    files: ['**/*.md'],
+    plugins: {
+      markdown
+    },
+    processor: 'markdown/markdown'
+  }
+]