Optimize collection creation in Navigation.kt (#180)

* ⚡ Optimize collection creation in Navigation.kt

Replaced uses of `.map { ... }.toSet()` with `.mapTo(mutableSetOf()) { ... }` in Navigation.kt. This avoids the creation of intermediate ArrayList objects, saving unnecessary memory allocations.

* ⚡ Optimize collection creation in Navigation.kt

Replaced uses of `.map { ... }.toSet()` with `.mapTo(mutableSetOf()) { ... }` in Navigation.kt. This avoids the creation of intermediate ArrayList objects, saving unnecessary memory allocations. Fixed ktlint formatting issues causing CI failure.

app/src/test/java/com/m57/hermescontrol/NavigationBenchmarkTest.kt

@@ -0,0 +1,38 @@
+package com.m57.hermescontrol
+
+import org.junit.Test
+import kotlin.system.measureNanoTime
+
+class NavigationBenchmarkTest {
+    @Test
+    fun benchmarkMapToSet() {
+        // Simulate ALL_NAV_ITEMS which has 20 items
+        val items = (1..20).toList()
+
+        // Warmup
+        for (i in 1..10000) {
+            val a = items.map { it }.toSet()
+            val b = items.mapTo(mutableSetOf()) { it }
+        }
+
+        var timeMapToSet: Long = 0
+        var timeMapTo: Long = 0
+
+        val iterations = 100000
+        for (i in 1..iterations) {
+            timeMapToSet +=
+                measureNanoTime {
+                    items.map { it }.toSet()
+                }
+            timeMapTo +=
+                measureNanoTime {
+                    items.mapTo(mutableSetOf()) { it }
+                }
+        }
+
+        println("============================")
+        println("Baseline (.map.toSet): ${timeMapToSet / iterations} ns/op")
+        println("Optimized (.mapTo): ${timeMapTo / iterations} ns/op")
+        println("============================")
+    }
+}