Add deployment pipeline and clean up repo

- Add Dockerfile, docker-compose.yml, .dockerignore, .env (port 3842)
- Add Caddyfile.snippet for analytics gateway import pattern
- Add .gitea/workflows/deploy.yaml for act_runner SSH deploy
- Untrack sensitive/data files (SCPA xlsx, owners.rds)
- Add renv lockfile and infrastructure files
- Reorganize data-raw scripts and add SarasotaCounty boundary data
- Move www assets to www/images/, add docs PDFs

.dockerignore

@@ -0,0 +1,19 @@
+renv/library/
+renv/staging/
+renv/local/
+renv/python/
+
+.Rproj.user/
+.Rhistory
+.RData
+.DS_Store
+
+.Rprofile
+renv/activate.R
+renv/settings.json
+
+data-raw/
+
+CLAUDE.md
+TODO.md
+README.md