Switch to zeallot %<-% for list ouput

[cregouby]

To improve code readability and maintainability

✔ |     1  24 | pretraining [43.2s]                                                                                                       

══ Results ═══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════
Duration: 422.8 s

── Skipped tests (3) ─────────────────────────────────────────────────────────────────────────────────────────────────────────────────────
• On Linux (3): test-hardhat_interfaces.R:110:3, test-hardhat_interfaces.R:174:3, test-pretraining.R:154:3

[ FAIL 0 | WARN 0 | SKIP 3 | PASS 351 ]

── R CMD check results ──────────────────────────────────────────────── tabnet 0.4.0.9000 ────
Duration: 3m 44.8s

0 errors ✔ | 0 warnings ✔ | 0 notes ✔

R CMD check succeeded

[codecov]

Codecov Report

Attention: 2 lines in your changes are missing coverage. Please review.

Comparison is base (8beb690) 87.24% compared to head (2f12ac8) 87.24%.

❗ Current head 2f12ac8 differs from pull request most recent head 7d36f85. Consider uploading reports for the commit 7d36f85 to get more accurate results

Files	Patch %	Lines
R/model.R	83.33%	2 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #133   +/-   ##
=======================================
  Coverage   87.24%   87.24%           
=======================================
  Files          10       10           
  Lines        1215     1215           
=======================================
  Hits         1060     1060           
  Misses        155      155           

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