Adds `within` and `eval_code` to `teal_data_module` #1466

All 207 tests pass in 12s

    1 files ±0   19 suites ±0 12s ⏱️ ±0s
207 tests ±0 207 ✔️ ±0 0 💤 ±0 0 ❌ ±0
403 runs ±0 403 ✔️ ±0 0 💤 ±0 0 ❌ ±0

Results for commit f661743. ± Comparison against earlier commit af76edc.