feat(fonts): refactor and add support for customize

[neoFelhz]

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What kind of change does this PR introduce? (check one with "x")

• Bug fix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
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Description

Add support for customize

Users can choose to use google fonts, ustclug proxy, 75Team's public CDN, or choose the host they want.

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