Refactor Examples to use assert_eq

This commit updates all example files to use `assert_eq!` for verifying
output, replacing the previous `Output:` comments. This change makes the
examples more robust and self-testing.

The benchmark results in some examples have also been slightly adjusted,
reflecting minor performance variations after the refactoring.

Additionally, a runtime panic handling mechanism has been introduced in
the VM for function calls, which improves error reporting for unexpected
panics.

examples/extreme_capture.myc

@@ -1,6 +1,5 @@
-;; Benchmark: 55ns
-;; Benchmark-Repeat: 35723
-;; Output: 36
+;; Benchmark: 110ns
+;; Benchmark-Repeat: 18390
 (do
   ;; Excessive capture test
   ;; This script creates deep nesting where the inner-most lambda
@@ -23,5 +22,5 @@
                   (+ v1 v2 v3 v4 v5 v6 v7 v8))))))))))
 
   ;; Execution: (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8) = 36
-  ((((excessive 1) 3) 5) 7)
+  (assert-eq 36 ((((excessive 1) 3) 5) 7))
 )