* opt!:remove non-xapian fulltext creation logic
BREAKING CHANGE: after this PR, xapian package will have to installed
before the compilation. on Linux, this should be libxapian-dev package.
For common users: all created fulltext which is not created by xapian
before will be recreated using the new
engine.
* fix: remove old fulltext search ui
* 🎨 apply clang-format changes
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Co-authored-by: xiaoyifang <xiaoyifang@users.noreply.github.com>