Adopt copilot instructions (#3689)

.github/copilot-instructions.md

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+Use the Vue 3 Composition API instead of the Options API when writing Vue components. An exception is when overriding or extending a PrimeVue component for compatibility, you may use the Options API.
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+Use setup() function for component logic
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+Utilize ref and reactive for reactive state
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+Implement computed properties with computed()
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+Use watch and watchEffect for side effects
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+Implement lifecycle hooks with onMounted, onUpdated, etc.
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+Utilize provide/inject for dependency injection
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+Use vue 3.5 style of default prop declaration.
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+Use Tailwind CSS for styling
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+Leverage VueUse functions for performance-enhancing styles
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+Use lodash for utility functions
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+Use TypeScript for type safety
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+Implement proper props and emits definitions
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+Utilize Vue 3's Teleport component when needed
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+Use Suspense for async components
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+Implement proper error handling
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+Follow Vue 3 style guide and naming conventions
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+Use Vite for fast development and building
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+Use vue-i18n in composition API for any string literals. Place new translation entries in src/locales/en/main.json.