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/optimizer_collision_repro.myc

@@ -1,6 +1,5 @@
-;; Benchmark: 55ns
-;; Benchmark-Repeat: 36353
-;; Output: 13
+;; Benchmark: 110ns
+;; Benchmark-Repeat: 19224
 (do
   (macro wrap [f] `(fn [x] (~f x)))
 
@@ -10,4 +9,4 @@
   (def w1 (wrap add1))
   (def w2 (wrap add2))
 
-  (w1 (w2 10)))
+  (assert-eq 13 (w1 (w2 10))))