feat: init progettino - OpenCode environment setup

- AGENTS.md with agent instructions
- README with project overview
- .gitignore for the project structure

.gitignore

@@ -0,0 +1,17 @@
+# OpenCode
+.opencode/node_modules/
+.opencode/package-lock.json
+.opencode/package.json
+.opencode/.gitignore
+.opencode/memory/.gitignore
+
+# Supertonic (separate repo)
+/supertonic/
+
+# Firecrawl scraped data
+.firecrawl/
+
+# Python
+__pycache__/
+*.pyc
+.venv/