Rename package to cy.hexor.furumi, add F-Droid compatibility

- Rename applicationId and all sources from com.example.furumi_android to cy.hexor.furumi
- Add WTFPL LICENSE
- Add fastlane metadata
- Add fdroiddata build metadata cy.hexor.furumi.yml
- Remove foojay-resolver plugin (blocked by F-Droid scanner)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

app/src/test/java/cy/hexor/furumi/ExampleUnitTest.kt

@@ -0,0 +1,17 @@
+package cy.hexor.furumi
+
+import org.junit.Test
+
+import org.junit.Assert.*
+
+/**
+ * Example local unit test, which will execute on the development machine (host).
+ *
+ * See [testing documentation](http://d.android.com/tools/testing).
+ */
+class ExampleUnitTest {
+    @Test
+    fun addition_isCorrect() {
+        assertEquals(4, 2 + 2)
+    }
+}

app/src/test/java/cy/hexor/furumi/domain/model/ServerConfigTest.kt

@@ -0,0 +1,35 @@
+package cy.hexor.furumi.domain.model
+
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Test
+
+class ServerConfigTest {
+    @Test
+    fun normalizeBaseUrl_addsHttpsWhenSchemeIsMissing() {
+        val result = ServerConfig.normalizeBaseUrl("media.example.com")
+
+        assertEquals("https://media.example.com", result.getOrThrow())
+    }
+
+    @Test
+    fun normalizeBaseUrl_trimsTrailingSlashButKeepsPath() {
+        val result = ServerConfig.normalizeBaseUrl(" https://media.example.com/furumi/ ")
+
+        assertEquals("https://media.example.com/furumi", result.getOrThrow())
+    }
+
+    @Test
+    fun normalizeBaseUrl_rejectsQueryStrings() {
+        val result = ServerConfig.normalizeBaseUrl("https://media.example.com?token=bad")
+
+        assertTrue(result.isFailure)
+    }
+
+    @Test
+    fun credentials_requireLogin() {
+        val result = ServerConfig.credentials("https://media.example.com", " ")
+
+        assertTrue(result.isFailure)
+    }
+}