[Docs] translated 'feature_tap_dance.md' to japanese. (qmk#8137)

* complete translation.

* Update docs/ja/feature_tap_dance.md

Update the file based on the suggestions.

* Update docs/ja/feature_tap_dance.md

Update the file based on the suggestions.

* Apply suggestions from code review

Update the file based on the suggestions.

* Apply suggestions from code review

Update the file based on the suggestions (Part 2).

* Apply suggestions from code review

Update the file based on the suggestions (Part 3).

* Apply suggestions from code review

Update the file based on the suggestions (Part 3).

* Apply suggestions from code review

Update the file based on the suggestions (Part 4).

* Apply suggestions from code review

Update the file based on the suggestions (Part 5).
ご提案いただいた修正案は全て確認できました。
続いて、コメント行の調整、「打つ・叩く」の変更、その他の修正を行います。

* fixed typo.

* Update the file based on the suggestions (Part 6).

* Update the file based on the suggestions (Part 7).

* Fixed sentence.

* Update docs/ja/feature_tap_dance.md

Update the file based on the suggestions (Part 8).

* Update the file based on the suggestions (Part 9).

Co-Authored-By: Takeshi ISHII <[email protected]>
Co-Authored-By: shela <[email protected]>