fix(input): [input] fix input small size of font

[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
  • Introduced new styling for small and mini input elements, enhancing their appearance with specific font sizes.
  • Added a new CSS variable for small input font size to improve consistency across input fields.

[coderabbitai[bot]]

Walkthrough

The changes involve the addition of new CSS rules for input elements in the index.less file, specifically for small and mini input sizes. A new variable for the font size of small input elements is introduced in the vars.less file. These modifications aim to enhance the styling of input components by defining specific font sizes and maintaining existing suffix styles.

Changes

File	Change Summary
packages/theme/src/input/index.less	Added styles for input-prefix-cls for &-small and &-mini sizes, including a new inner class for font size. Retained existing suffix class with adjusted top properties.
packages/theme/src/input/vars.less	Introduced a new CSS variable --tv-Input-small-font-size referencing --tv-font-size-sm.

Possibly related PRs

• #2128: Introduces new variables in vars.less related to the --tv-Input-small-font-size variable.
• #2151: Addresses styling issues for disabled text areas, which may relate to input element styling enhancements.
• #2157: Optimizes theme style variables, aligning with the new font size definitions for input components.
• #2154: Fixes tooltip class names within forms, connected to overall input element styling improvements.
• #2158: Updates the design of the Cascader component, relating to the overall theme and styling consistency.

Suggested reviewers

• kagol

🐰 In fields of code, we hop and play,
With styles for inputs, brightening the day.
Small and mini, now dressed just right,
Font sizes dancing, a delightful sight!
Let's celebrate changes, both big and small,
For in this theme, we cherish them all! 🌼

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