* add: python.md to japanese
* fix: style of Japanese
* translate: English placeholders into Japanese
* Update pages.ja/common/python.md
Co-authored-by: Machiavelli <145562237+MachiavelliII@users.noreply.github.com>
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Co-authored-by: Machiavelli <145562237+MachiavelliII@users.noreply.github.com>