append Schema::set_page_size(int)

[shewer]

在runtime 中 所有關於 page_size 都是從 schema.page_size() 調用 ， 增加 設定 set_page_size() 可以在方案 運行時 調整page_size

Pull request

Issue tracker

Fixes will automatically close the related issue

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Feature

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Unit test

• [ ] Done

Manual test

• [x] Done by rime_api_console( librime-lua script )

Code Review

1. Unit and manual test pass
2. GitHub Action CI pass
3. At least one contributor reviews and votes
4. Can be merged clean without conflicts
5. PR will be merged by rebase upstream base

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