Support searching by/redirecting from .bit alias

[Keith-CY]

1. when the search keyword, such as magickbase.bit hits the rule ends with .bit, it can be treated as searching the CKB address mapped from the keyword and expected to be redirected to the address page

2. if a URL as /address/magickbase.bit is visited directly, it can be treated as trying to visit the mapped CKB address. If a CKB address can be found, redirect the page to /address/mapped_ckb_address