feat(ui): add TagsInput component with click-to-edit behavior (#8066)

## Summary

Add TagsInput component based on shadcn-vue/Reka UI primitives with a
click-to-edit UX pattern.

## Features

- **Click-to-edit behavior**: Starts in read-only state; clicking
enables editing and focuses input; clicking outside exits edit mode
- **Disabled state**: When `disabled=true`, component is completely
inert
- **Empty state placeholder**: Shows input placeholder when tag list is
empty
- **Animated transitions**: Delete button animates when toggling edit
mode

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Co-authored-by: Amp <amp@ampcode.com>

src/locales/en/main.json

@@ -16,6 +16,7 @@
     "increment": "Increment",
     "removeImage": "Remove image",
     "removeVideo": "Remove video",
+    "removeTag": "Remove tag",
     "chart": "Chart",
     "chartLowercase": "chart",
     "file": "file",