Add radial mode, UI controls, front camera, update to API 35

- Add radial/elliptical blur mode with aspect ratio control
- Add UI sliders for blur intensity, falloff, and shape
- Add front camera support with flip button
- Update minimum SDK to API 35 (Android 15)
- Enable landscape orientation (fullSensor)
- Rename app to "Naiv Tilt Shift Camera"
- Set APK output name to naiv-tilt-shift
- Add project specification document

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/build.gradle.kts

@@ -10,7 +10,7 @@ android {
 
     defaultConfig {
         applicationId = "no.naiv.tiltshift"
-        minSdk = 26
+        minSdk = 35
         targetSdk = 35
         versionCode = 1
         versionName = "1.0.0"
@@ -18,6 +18,8 @@ android {
         vectorDrawables {
             useSupportLibrary = true
         }
+
+        base.archivesName.set("naiv-tilt-shift")
     }
 
     buildTypes {