feat(model-selector): add model selector component

[SonyLeo]

组件的效果预览

Summary

• Add the ModelSelector component.
• Support controlled and uncontrolled model, effort, and open states.
• Add model search, grouping, disabled options, keyboard navigation, and ARIA support.
• Add Floating UI positioning, Teleport support, focus restoration, and outside click handling.
• Support custom trigger, item, group label, empty, panel header, and footer slots.
• Add built-in reasoning effort selection.

Scope

This PR only adds the ModelSelector component implementation and its styles. Tests, documentation, and demos will be added separately.

Validation

• pnpm -F @opentiny/tiny-robot type-check

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📥 Commits

Reviewing files that changed from the base of the PR and between e8440c0 and e6c3c86.

📒 Files selected for processing (20)

• packages/components/src/index.ts
• packages/components/src/model-selector/components/ModelSelectorEffort.vue
• packages/components/src/model-selector/components/ModelSelectorGroup.vue
• packages/components/src/model-selector/components/ModelSelectorItem.vue
• packages/components/src/model-selector/components/ModelSelectorPanel.vue
• packages/components/src/model-selector/components/ModelSelectorTrigger.vue
• packages/components/src/model-selector/composables/useModelSelectorEffort.ts
• packages/components/src/model-selector/composables/useModelSelectorFilter.ts
• packages/components/src/model-selector/composables/useModelSelectorFloating.ts
• packages/components/src/model-selector/composables/useModelSelectorNavigation.ts
• packages/components/src/model-selector/composables/useModelSelectorState.ts
• packages/components/src/model-selector/index.less
• packages/components/src/model-selector/index.ts
• packages/components/src/model-selector/index.type.ts
• packages/components/src/model-selector/index.vue
• packages/components/src/model-selector/internal.type.ts
• packages/components/src/model-selector/normalizeModelEfforts.ts
• packages/components/src/model-selector/normalizeModelOptions.ts
• packages/components/src/styles/components/index.css
• packages/components/src/styles/components/model-selector.less

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commit: e6c3c86