feat: macros for posts to extend page functionality

src/renderer/macros/definitions/index.ts

@@ -0,0 +1,17 @@
+/**
+ * Macro Definitions Index
+ * 
+ * This file imports all macro definitions so they self-register.
+ * To add a new macro:
+ * 1. Create a new file in this folder (e.g., myMacro.ts)
+ * 2. Implement MacroDefinition interface
+ * 3. Call registerMacro() at the end
+ * 4. Import it here
+ */
+
+// Import all macro definitions - they self-register on import
+import './gallery';
+import './youtube';
+
+// Add new macro imports here:
+// import './myNewMacro';