Merge Develop into Main (#300)

- Made an external app from internal Calculator app
- Update tactility.py to v1.2.0 (fix bug with selfupdate)
- Added warning to Development service UI
- Add context to `SECURITY.md`
- Split `ObjectFileReader` and `ObjectFileWriter` into separate cpp files
- Fix related to GPS config read errors

ExternalApps/Calculator/main/Source/Calculator.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#include "tt_app.h"
+
+#include <lvgl.h>
+#include "Str.h"
+#include "Dequeue.h"
+
+class Calculator {
+
+    lv_obj_t* displayLabel;
+    lv_obj_t* resultLabel;
+    char formulaBuffer[128] = {0}; // Stores the full input expression
+    bool newInput = true;
+
+    static void button_event_cb(lv_event_t* e);
+    void handleInput(const char* txt);
+    void evaluateExpression();
+    double computeFormula();
+    static Dequeue<Str> infixToRPN(const Str& infix);
+    static double evaluateRPN(Dequeue<Str> rpnQueue);
+    void resetCalculator();
+
+public:
+
+    void onShow(AppHandle context, lv_obj_t* parent);
+};