feat(settings): in-app chat font size setting (#1004) (#1005)

Co-authored-by: M57 <hy4ri@users.noreply.github.com>

app/src/test/java/com/m57/hermescontrol/data/config/ServerStoreTest.kt

@@ -15,6 +15,7 @@ class ServerStoreTest {
         assertEquals(9119, state.port)
         assertTrue(state.autoReconnect)
         assertEquals("token", state.wsAuthParam)
+        assertEquals(1.0f, state.chatFontScale)
         assertTrue(state.connectionProfiles.isEmpty())
         assertNull(state.selectedProfileId)
     }