refactor: reorganize project structure and update configurations

- Move migrations/ to database/schema/ for clarity on database schema definitions
- Move sqlc.yaml to internal/database/ to group with database code
- Move static/ to cmd/server/static/ to co-locate with server
- Update all configuration files and documentation
- Follow Go project conventions for better organization

package.json

@@ -0,0 +1,18 @@
+{
+  "name": "bookmann",
+  "version": "1.0.0",
+  "description": "A self-hosted ebook management system",
+  "scripts": {
+    "build:css": "tailwindcss -i ./cmd/server/static/input.css -o ./cmd/server/static/style.css --watch",
+    "build:css:prod": "tailwindcss -i ./cmd/server/static/input.css -o ./cmd/server/static/style.css --minify",
+    "postinstall": "mkdir -p cmd/server/static && curl -o cmd/server/static/htmx.min.js https://unpkg.com/htmx.org@1.9.10/dist/htmx.min.js"
+  },
+  "devDependencies": {
+    "tailwindcss": "^3.4.0",
+    "autoprefixer": "^10.4.0",
+    "@tailwindcss/forms": "^0.5.7"
+  },
+  "scripts": {
+    "postinstall": "mkdir -p cmd/server/static && npx htmx-org@1.9.10 dist/htmx.min.js -o cmd/server/static/htmx.min.js"
+  }
+}