feat: add canonical URL handling and entity quality checks

- Implemented canonical URL strategies for city-specific domains and entities.
- Added helper functions for domain and city resolution.
- Created tests for canonical URL generation and domain resolution.
- Introduced entity quality checks for doctors and clinics to ensure meaningful content.
- Developed unique introductory texts for listing pages to avoid duplicate content.
- Established robots.txt policies for listing pages to manage indexing based on user filters.
- Enhanced specialty content with dynamic introductions and FAQs to improve SEO.

app/component/head/index.js

@@ -1,12 +1,14 @@
-function HeadPageList({ children, title, detail }) {
+// titleTag: صفحاتی که h1 خودشان را جای دیگری دارند «p» می‌فرستند تا صفحه دو h1 نگیرد.
+// کلاس‌ها مستقل از تگ‌اند، پس ظاهر در هر دو حالت یکسان است.
+function HeadPageList({ children, title, detail, titleTag: TitleTag = "h1" }) {
   return (
     <div className="bg-head-menu !bg-no-repeat !bg-cover !bg-center">
       <div
         className=" padding-responsive flex flex-col items-center gap-[25px] pt-[calc(12px_+_75px_+_32px)] sm:pt-[calc(21px_+_75px_+_45px)] md:pt-[calc(30px_+_75px_+_58px)] lg:pt-[calc(40px_+_75px_+_78px)] pb-[62px] sm:pb-[69px] md:pb-[76px] lg:pb-[85px] "
       >
-        <h1 className="text-[#3B3B3B] text-[16px] sm:text-[19px] md:text-[22px] lg:text-[24px] text-center font-bold">
+        <TitleTag className="text-[#3B3B3B] text-[16px] sm:text-[19px] md:text-[22px] lg:text-[24px] text-center font-bold">
           {title}
-        </h1>
+        </TitleTag>
         <p className="text-[#3B3B3B] text-[14px] md:text-[16px] text-center font-normal">
           {detail}
         </p>