docs:文档改造

[interstellarmt]

• mark-interval
• component-legend

[petercat-assistant]

Walkthrough

This pull request focuses on revamping the documentation for the mark-interval component in the G2 library. The changes include updates to the descriptions, examples, and configuration options for various chart types such as area and interval charts. The documentation now provides more detailed explanations and examples to enhance understanding and usability.

Changes

Files	Summary
site/docs/manual/core/mark/area.zh.md	Updated descriptions and examples for area charts, including new configuration options and visual channel explanations.
site/docs/manual/core/mark/interval.zh.md	Added comprehensive descriptions and examples for interval charts, detailing various chart types and configurations.
site/examples/general/interval/demo/interval-style.ts	Introduced a new example demonstrating interval chart styling and configuration.
site/examples/general/interval/demo/meta.json	Updated metadata related to interval chart examples.

🪧 Tips

For further assistance, please describe your question in the comments and @petercat-assistant to start a conversation with me.

[coveralls]

Pull Request Test Coverage Report for Build 13852547247

Warning: This coverage report may be inaccurate.

This pull request's base commit is no longer the HEAD commit of its target branch. This means it includes changes from outside the original pull request, including, potentially, unrelated coverage changes.

• For more information on this, see Tracking coverage changes with pull request builds.
• To avoid this issue with future PRs, see these Recommended CI Configurations.
• For a quick fix, rebase this PR at GitHub. Your next report should be accurate.

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 25 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.004%) to 86.69%

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Files with Coverage Reduction	New Missed Lines	%
src/interaction/tooltip.ts	25	91.01%

Totals
Change from base Build 13701372610:	0.004%
Covered Lines:	10617
Relevant Lines:	11872

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💛 - Coveralls