fix: correct spelling errors and markdown linting violations

[Copilot]

Addresses code review feedback on documentation quality issues in Advice_Tips_data_visualization.md.

Spelling corrections:

• typograhy → typography in figure elements section
• resuable → reusable in R themes section heading

Markdown linting fixes:

• Removed trailing spaces and excess blank lines
• Rewrapped lines exceeding 120 character limit for improved readability

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