MikoRoku: rebuild extension for current site

[Readwips]

Summary

• Migrate MikoRoku from the obsolete ZeistManga multisrc implementation to an individual KeiSource using extension lib 1.6.
• Use the site's Blogger JSON fallback directly for manga, search, chapter, and page data.
• Preserve the extension name, language, package, source ID 8593493873810750465, content warning, and existing icons.
• Add pagination, detail metadata, decimal chapter support, duplicate removal, lazy-loaded page images, and image filtering.

Website architecture

The current site is a static Cloudflare-hosted frontend with Firestore integration and an official Blogger fallback. The extension uses the Blogger JSON endpoints directly and parses HTML fragments from content.$t with Jsoup. It does not use WebView or require new dependencies.

Testing

• ./gradlew :src:id:mikoroku:spotlessApply - passed
• ./gradlew :src:id:mikoroku:spotlessCheck - passed
• ./gradlew :src:id:mikoroku:assembleDebug - passed
• Live request/parser smoke tests - 11 passed, 0 failed
  • popular and latest
  • catalog and search pagination
  • search hit, empty query, and no results
  • ongoing and completed manga details
  • 40-chapter ongoing title including decimal chapters
  • completed title chapter list
  • page extraction and credit-image filtering
  • cover/page image HTTP responses without special Referer
  • expected HTTP 404 handling
• Android/Mihon runtime test - not performed because no device or emulator was available

Notes

This change is AI-assisted. The implementation and generated diff still require contributor manual review before the PR is marked ready.

Checklist:

• Updated versionCode value in build.gradle.kts
• Updated baseVersionCode in build.gradle.kts (not applicable; no multisrc theme was changed)
• Referenced all related issues in the PR body (no related issue)
• Set the contentWarning configuration in build.gradle.kts appropriately
• Have not changed source names
• Have explicitly kept the id if a source's name or language were changed
• Have tested the modifications by compiling and running the extension through Android Studio
• Have removed web_hi_res_512.png when adding a new extension (not applicable; existing extension and icons retained)
• This PR is AI-assisted, I have reviewed the changes manually and confirmed they are not slop

[TheKingTermux]

• This PR is AI-assisted, I have reviewed the changes manually and confirmed they are not slop

checklist this for AI assisted PR

• Referenced all related issues in the PR body (no related issue)

you haven't include any issues related to MikoRoku yet, you can add this to description

closed #14316
closed #14508
closed #15824

• Have tested the modifications by compiling and running the extension through Android Studio

you not tested this yet? if you aleardy test it, don't forget to checklist this