Initial spec for Sagaphone

Pulled from Notion project docs: overview, architecture, data model,
event system, line logic, and implementation notes for the family-tree
generator + TTS narrator.

Co-Authored-By: Claude <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,29 @@
+# Lock files
+uv.lock
+bun.lockb
+
+# Secrets & live config (commit *.toml.example only)
+secrets.toml
+*.toml
+!*.toml.example
+!pyproject.toml
+
+# Python
+__pycache__/
+*.pyc
+.venv/
+.pytest_cache/
+.ruff_cache/
+
+# Node / Svelte
+node_modules/
+.svelte-kit/
+build/
+dist/
+
+# Pulumi
+Pulumi.*.yaml
+!Pulumi.yaml
+
+# OS
+.DS_Store