add config structure

src/zona/config.py

@@ -1 +1,28 @@
+from dataclasses import dataclass, field
 
+
+@dataclass
+class MarkdownConfig:
+    image_labels: bool = True
+
+
+@dataclass
+class ThemeConfig:
+    name: str = "default"
+    syntax_highlighting: bool = True
+
+
+@dataclass
+class BuildConfig:
+    clean_output_dir: bool = True
+    include_drafts: bool = False
+
+
+@dataclass
+class ZonaConfig:
+    title: str = "Zona Blog"
+    base_url: str = "https://example.com"
+    language: str = "en"
+    markdown: MarkdownConfig = field(default_factory=MarkdownConfig)
+    theme: ThemeConfig = field(default_factory=ThemeConfig)
+    build: BuildConfig = field(default_factory=BuildConfig)