Added basic Scheduling Functionality

A JSON message can now be received on:
'vesper/DEV_ID/control/addSchedule"
Each message, must hold a "file" and "data".
The file is the month's name in 3 letter mode (eg jan, feb, mar)
The data is an entry for each day of the month.
Each day can be an array containing multiple items.

vesper/PlaybackControls.hpp

@@ -0,0 +1,70 @@
+#pragma once
+
+extern Player melody;
+
+bool timeToStop(unsigned long now);
+bool timeToPause(unsigned long now);
+bool timeToResume(unsigned long now);
+void durationTimer(void *param);
+
+// Timer TASK to control playback state
+void durationTimer(void *param) {
+
+  // Task Setup
+
+
+  // Task Loop
+  while (true) {
+
+    unsigned long now = millis();
+
+    if (timeToStop(now)) {
+        player.stop();
+    } else if (timeToPause(now)) {
+        player.pause();
+    } else if (timeToResume(now)) {
+        player.unpause();
+    }
+
+    vTaskDelay(pdMS_TO_TICKS(1000)); // Check every 100ms
+    }
+}
+
+// Check if it's time to stop playback
+bool timeToStop(unsigned long now) {
+    if (player.isPlaying) {
+        uint64_t stopTime = player.startTime + player.duration;
+        if (now >= stopTime) {
+            Serial.println("TIMER: Total Duration Reached");
+            return true;
+        }
+    }
+    return false;
+}
+
+// Check if it's time to pause playback
+bool timeToPause(unsigned long now) {
+    if (player.isPlaying && player.loop_duration > 0) {
+        uint64_t pauseTimeLimit = player.loopStartTime + player.loop_duration;
+        Serial.printf("PTL: %lu // NOW: ",pauseTimeLimit);
+        Serial.println(now);
+        if (now >= pauseTimeLimit && !player.isPaused) {
+            Serial.println("TIMER: Segment Duration Reached");
+            player.pauseTime = now;
+            return true;
+        }
+    }
+    return false;
+}
+
+// Check if it's time to resume playback
+bool timeToResume(unsigned long now) {
+    if (player.isPaused) {
+        uint64_t resumeTime = player.pauseTime + player.interval;
+        if (now >= resumeTime) {
+            Serial.println("TIMER: Pause Duration Reached");
+            return true;
+        }
+    }
+    return false;
+}