Add direnv setup: .envrc loads gitignored .env, template in .env.example

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

.env.example

@@ -0,0 +1,11 @@
+# Copy to .env and fill in. .env is gitignored — never commit real values.
+
+# BGG XML API application token (register at https://boardgamegeek.com/applications)
+BGG_API_TOKEN=
+
+# BGG website login for the upload stage (Playwright)
+BGG_USERNAME=
+BGG_PASSWORD=
+
+# Anthropic API key for the vision extract stage
+ANTHROPIC_API_KEY=

.envrc

@@ -0,0 +1,3 @@
+# Loaded automatically by direnv when you cd into this directory.
+# Secrets live in .env (gitignored) — see .env.example for the template.
+dotenv_if_exists