refactor: VolunteerProfileViewModel 추가

feature/login/src/main/java/com/kusitms/connectdog/feature/signup/volunteer/VolunteerProfileViewModel.kt

@@ -0,0 +1,24 @@
+package com.kusitms.connectdog.feature.signup.volunteer
+
+import androidx.compose.runtime.MutableState
+import androidx.compose.runtime.mutableStateOf
+import androidx.lifecycle.ViewModel
+import dagger.hilt.android.lifecycle.HiltViewModel
+import javax.inject.Inject
+
+@HiltViewModel
+class VolunteerProfileViewModel @Inject constructor() : ViewModel() {
+    private val _isProfileImageSelected: MutableState<Boolean> = mutableStateOf(false)
+    private val _isNicknameAvailable: MutableState<Boolean> = mutableStateOf(false)
+
+    val isProfileImageSelected get() = _isProfileImageSelected.value
+    val isNicknameAvailable get() = _isNicknameAvailable.value
+
+    fun updateProfileImageSelected(selected: Boolean) {
+        _isProfileImageSelected.value = selected
+    }
+
+    fun updateNicknameAvailability(available: Boolean) {
+        _isNicknameAvailable.value = available
+    }
+}