Adds `within` and `eval_code` to `teal_data_module` #1463

All 203 tests pass in 12s

    1 files ±0   19 suites ±0 12s ⏱️ -1s
203 tests ±0 203 ✔️ ±0 0 💤 ±0 0 ❌ ±0
377 runs ±0 377 ✔️ ±0 0 💤 ±0 0 ❌ ±0

Results for commit e31ae85. ± Comparison against earlier commit a861bec.