feat(installation): add installation entry form and pages

- Create new installation entry form component with validation
- Add installation list and add pages with basic routing
- Implement custom select component for encounter class selection
- Update SelectTrigger styling for better icon positioning

app/components/pub/custom-ui/form/select.vue

@@ -0,0 +1,85 @@
+<script setup lang="ts">
+import { SelectRoot } from 'radix-vue'
+import {
+  SelectContent,
+  SelectGroup,
+  SelectItem,
+  SelectLabel,
+  SelectSeparator,
+  SelectTrigger,
+  SelectValue,
+} from '~/components/pub/ui/select'
+import { cn } from '~/lib/utils'
+
+interface Item {
+  value: string
+  label: string
+  code?: string
+}
+
+const props = defineProps<{
+  modelValue?: string
+  items: Item[]
+  placeholder?: string
+  label?: string
+  separator?: boolean
+  class?: string
+}>()
+
+const emit = defineEmits<{
+  'update:modelValue': [value: string]
+}>()
+
+// Sort items with selected item first, then alphabetically
+const sortedItems = computed(() => {
+  const itemsWithSelection = props.items.map(item => ({
+    ...item,
+    isSelected: item.value === props.modelValue,
+  }))
+
+  return itemsWithSelection.sort((a, b) => {
+    // Selected item always comes first
+    if (a.isSelected && !b.isSelected) return -1
+    if (!a.isSelected && b.isSelected) return 1
+
+    // If neither or both are selected, sort by label alphabetically
+    return a.label.localeCompare(b.label)
+  })
+})
+
+function onValueChange(value: string) {
+  emit('update:modelValue', value)
+}
+</script>
+
+<template>
+  <SelectRoot :model-value="modelValue" @update:model-value="onValueChange">
+    <SelectTrigger :class="cn('w-full', props.class)">
+      <SelectValue :placeholder="placeholder || 'Pilih item'" />
+    </SelectTrigger>
+
+    <SelectContent>
+      <SelectGroup>
+        <SelectLabel v-if="label">
+          {{ label }}
+        </SelectLabel>
+
+        <SelectItem
+          v-for="item in sortedItems"
+          :key="item.value"
+          :value="item.value"
+          class="cursor-pointer"
+        >
+          <div class="flex items-center justify-between w-full">
+            <span>{{ item.label }}</span>
+            <span v-if="item.code" class="text-xs text-muted-foreground ml-2">
+              {{ item.code }}
+            </span>
+          </div>
+        </SelectItem>
+
+        <SelectSeparator v-if="separator" />
+      </SelectGroup>
+    </SelectContent>
+  </SelectRoot>
+</template>