refactor(swicth): [switch]refactor switch theme

[zzcr]

PR

PR Checklist

Please check if your PR fulfills the following requirements:

• [ ] The commit message follows our Commit Message Guidelines
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

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?

Does this PR introduce a breaking change?

• [ ] Yes
• [ ] No

Other information

Summary by CodeRabbit

• New Features

  • Updated the switch component's styling variables to a new naming convention for improved theming consistency.
  • Introduced new variables for different switch states and loading indicators.

• Bug Fixes

  • Simplified test assertions for the switch button, focusing on relevant properties.

• Documentation

  • Clarified the updated mixin for CSS variable injection in the switch component.

[coderabbitai[bot]]

Walkthrough

The changes in this pull request involve updates to the switch component's styling and testing. The test case for the switch button has been simplified by removing assertions related to the border-top-color, focusing instead on the background-color. Additionally, the CSS variables used in the switch component have been updated from a ti- prefix to a tv- prefix, with corresponding adjustments in the associated LESS files to maintain consistency with the new naming convention.

Changes

Files	Change Summary
examples/sites/demos/pc/app/switch/basic-usage.spec.ts	Removed assertions checking the border-top-color of the switch button; retained assertions for background-color.
packages/theme/src/switch/index.less, packages/theme/src/switch/vars.less	Updated CSS variable names from --ti- to --tv-, replaced the mixin .component-css-vars-switch() with .inject-Switch-vars(), and modified various styling attributes to align with the new variable naming convention. Changes include updates to background colors, dimensions, and loading states for the switch component.

Possibly related PRs

• #2112: Updates to the expected CSS properties of a switch button component, specifically related to the border-top-color, aligning with the simplification of test assertions in this PR.
• #2167: Adapts the badge component to the SMB theme, potentially involving similar CSS variable updates as seen in the switch component changes.
• #2168: Modifications to the tiny-popconfirm components include updates to props and styling, reflecting a broader effort to align components with the new theming approach.
• #2174: Refactors the checkbox component's styling, sharing common themes and variable updates with the switch component adaptations.

Suggested reviewers

• zzcr

🐰 In the garden, changes bloom,
Switches dance, dispelling gloom.
From ti- to tv-, a fresh new start,
Styling brightens, a work of art.
Testing simplified, colors align,
Hopping forward, all will be fine! 🌼

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