feat(rich-text-editor): add row height and merge h1-h6 and pargraph

[Caesar-ch]

PR

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PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Documentation content changes
• Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

add row height and merge h1-h6 and pargraph

Does this PR introduce a breaking change?

• Yes
• No

Other information

[kagol]

这个应该叫行高line-height，不叫段落paragraph

[kagol]

可以在pr描述中贴一张效果图
@Caesar-ch

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@Caesar-ch