Add try-catch-finally support: parse and generate opcodes for this construct

Fix varg generation: generate *_n opcodes with parameters in following meta opcodes
Add stack internal structure: dimanically allocated stack.
Use dynamically allocated memory in parser: every local and global variables are stored in dinamically allocated stacks.
Use dynamically allocated memory in serializer: opcodes are also stored in stack.
Change is_true_jmp and is_false_jmp opcodes to relative.
Change *jmp* opcodes to be able to store opcode_counter_t instead of idx_t.

src/config.h

@@ -55,7 +55,7 @@
 /**
  * Size of heap
  */
-#define CONFIG_MEM_HEAP_AREA_SIZE (2 * 1024 + 512)
+#define CONFIG_MEM_HEAP_AREA_SIZE (4 * 1024 + 512)
 
 /**
  * Log2 of maximum possible offset in the heap