feat: add Application, MainActivity and Material3 theme

app/src/main/java/com/radiola/MainActivity.kt

@@ -0,0 +1,19 @@
+package com.radiola
+
+import android.os.Bundle
+import androidx.activity.ComponentActivity
+import androidx.activity.compose.setContent
+import androidx.activity.enableEdgeToEdge
+import com.radiola.ui.theme.RadiolaTheme
+
+class MainActivity : ComponentActivity() {
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        enableEdgeToEdge()
+        setContent {
+            RadiolaTheme {
+                // TODO: Navigation will go here
+            }
+        }
+    }
+}

app/src/main/java/com/radiola/RadiolaApplication.kt

@@ -0,0 +1,7 @@
+package com.radiola
+
+import android.app.Application
+import dagger.hilt.android.HiltAndroidApp
+
+@HiltAndroidApp
+class RadiolaApplication : Application()

app/src/main/java/com/radiola/ui/theme/Color.kt

@@ -0,0 +1,13 @@
+package com.radiola.ui.theme
+
+import androidx.compose.ui.graphics.Color
+
+val Primary = Color(0xFF6200EE)
+val PrimaryDark = Color(0xFF3700B3)
+val Secondary = Color(0xFF03DAC6)
+val Background = Color(0xFF121212)
+val Surface = Color(0xFF1E1E1E)
+val OnPrimary = Color.White
+val OnSecondary = Color.Black
+val OnBackground = Color.White
+val OnSurface = Color.White

app/src/main/java/com/radiola/ui/theme/Theme.kt

@@ -0,0 +1,38 @@
+package com.radiola.ui.theme
+
+import androidx.compose.foundation.isSystemInDarkTheme
+import androidx.compose.material3.MaterialTheme
+import androidx.compose.material3.darkColorScheme
+import androidx.compose.material3.lightColorScheme
+import androidx.compose.runtime.Composable
+
+private val DarkColorScheme = darkColorScheme(
+    primary = Primary,
+    secondary = Secondary,
+    background = Background,
+    surface = Surface,
+    onPrimary = OnPrimary,
+    onSecondary = OnSecondary,
+    onBackground = OnBackground,
+    onSurface = OnSurface
+)
+
+private val LightColorScheme = lightColorScheme(
+    primary = Primary,
+    secondary = Secondary,
+    onPrimary = OnPrimary,
+    onSecondary = OnSecondary
+)
+
+@Composable
+fun RadiolaTheme(
+    darkTheme: Boolean = isSystemInDarkTheme(),
+    content: @Composable () -> Unit
+) {
+    val colorScheme = if (darkTheme) DarkColorScheme else LightColorScheme
+    MaterialTheme(
+        colorScheme = colorScheme,
+        typography = Typography,
+        content = content
+    )
+}

app/src/main/java/com/radiola/ui/theme/Type.kt

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+package com.radiola.ui.theme
+
+import androidx.compose.material3.Typography
+import androidx.compose.ui.text.TextStyle
+import androidx.compose.ui.text.font.FontFamily
+import androidx.compose.ui.text.font.FontWeight
+import androidx.compose.ui.unit.sp
+
+val Typography = Typography(
+    headlineLarge = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Bold,
+        fontSize = 28.sp
+    ),
+    headlineMedium = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.SemiBold,
+        fontSize = 22.sp
+    ),
+    titleMedium = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 16.sp
+    ),
+    bodyMedium = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Normal,
+        fontSize = 14.sp
+    ),
+    labelMedium = TextStyle(
+        fontFamily = FontFamily.Default,
+        fontWeight = FontWeight.Medium,
+        fontSize = 12.sp
+    )
+)