feat: complete OpenAPI docs with all Puppeteer PDF options

- Add scale, pageRanges, preferCSSPageSize, width, height to PdfOptions
- Add headerTemplate, footerTemplate, displayHeaderFooter to docs
- Pass all options through routes to browser service for HTML, Markdown, and URL endpoints
- Export PdfRenderOptions interface for type reuse
- Bump version to 0.4.5

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "docfast-api",
-  "version": "0.4.3",
+  "version": "0.4.5",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "docfast-api",
-      "version": "0.4.3",
+      "version": "0.4.5",
       "dependencies": {
         "compression": "^1.8.1",
         "express": "^4.21.0",