feat(react): calendar enhancements and date-picker range mode

[wangdicoder]

Summary

• Calendar: Add range selection, multiple selection, keyboard navigation (arrow keys, Enter, Escape), week numbers, valid range restriction, dot indicators, decade panel, card mode, and cellClassName/cellStyle customization
• DatePicker: Add range mode with two-click date range selection, hover preview highlighting, and range display in input

Release

• Bump type: minor
• Affected packages: @tiny-design/react (tokens and icons will version together via fixed group)

Test plan

• Verify Calendar basic date selection still works
• Test range selection: click two dates to form a range, verify highlight
• Test multiple selection: toggle dates on/off
• Test keyboard navigation: arrow keys move focus, Enter selects, Escape clears
• Test week numbers with showWeekNumber and weekStartsOn={1}
• Test valid range: dates outside range are disabled, nav buttons disabled at boundaries
• Test dot indicators with dotRender
• Test decade panel: click title twice to navigate month → year → decade
• Test card mode with fullscreen={false}
• Test DatePicker range mode: select start and end dates
• Test DatePicker range with disabledDate
• Run pnpm test — all tests pass

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