feat: initial DCC RPG knowledge base + AI DM design

.gitignore

@@ -0,0 +1,21 @@
+# Generated PNG pages from PDF conversion
+dcc/pdf_pages/
+dcc/pdf_ocr/
+dcc/ocr_out/
+
+# Python cache
+__pycache__/
+*.pyc
+*.pyo
+*.db
+
+# Tool configuration (not part of project)
+.opencode/
+.sisyphus/
+
+# Generated graph artifacts
+graphify-out/
+
+# OS files
+.DS_Store
+Thumbs.db