Add test program for viewing stack.

tests/hellostack/.gitignore

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+hellostack
+*.seer

tests/hellostack/Makefile

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+.PHONY: all
+all: hellostack
+
+hellostack: hellostack.c
+	gcc -g -o hellostack hellostack.c
+
+.PHONY: clean
+clean:
+	rm -f hellostack
+

tests/hellostack/README

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+
+https://jvns.ca/blog/2021/05/17/how-to-look-at-the-stack-in-gdb/
+

tests/hellostack/hellostack.c

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+#include <stdio.h>
+#include <stdlib.h>
+
+int main() {
+    char stack_string[10] = "stack";
+    int x = 10;
+    char *heap_string;
+
+    heap_string = malloc(50);
+
+    printf("Enter a string for the stack: ");
+    gets(stack_string);
+    printf("Enter a string for the heap: ");
+    gets(heap_string);
+    printf("Stack string is: %s\n", stack_string);
+    printf("Heap string is: %s\n", heap_string);
+    printf("x is: %d\n", x);
+}
+