Hiper (multi-src): Migrate to 1.6, Filters & default max_rating

[cuong-tran]

• Add filters to search, with i18n
• Add maximum default rating to preferences
• Add type & rating to genre tag (so they can be clicked and search with filters)
• HiperDex: add mirrors and set default domain to .tv (since the error message in .com saying something like "use official at .tv")
• Migrate to lib 1.6
• Using KeiSource
• Using memo

Checklist:

• Updated versionCode value in build.gradle.kts
• Updated baseVersionCode in build.gradle.kts (if updated multisrc theme code)
• Referenced all related issues in the PR body (e.g. "Closes #xyz")
• 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
• This PR is AI-assisted, I have reviewed the changes manually and confirmed they are not slop