Jose Luis Montañes Ojados 84b3abbfda Add while loops, GC mark-and-sweep, and malloc block reuse ...

- Lexer: add INDENT/DEDENT tokens, <, >, : operators, while keyword,
  closing DEDENT emission, include guards
- Parser: add NODE_WHILE with while_loop union, parse while/cond/body
  blocks, include guards
- Eval: add while loop evaluation, GC integration with roots from env,
  debug and gc flags, <, > comparison operators
- GC: implement mark-and-sweep collector with 3 stages (mark roots,
  sweep unmarked, join free blocks)
- Allocator: block reuse via first-fit search with splitting, exponential
  heap growth, NULL check on malloc, include guards, marked field in metadata
- Object: add include guards, fix include to use allocator.h

2026-02-16 04:55:52 +01:00

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