[utils] Display page exports read back from a JSON file

[MohammadHijjawi97]

A page export saved with json.dump and loaded back stores every geometry as lists, not tuples. create_obj_patch and rect_patch only accepted tuples, so displaying such an export failed:

import json
from doctr.io import Document

restored = Document.from_dict(json.load(open("results.json")), pages=pages)
restored.pages[0].show()
# ValueError: invalid geometry format

The same happens when the loaded dict goes straight to visualize_page or visualize_kie_page. render(), synthesize() and the other exports already work on the restored page; only the display failed.

This PR accepts lists as well as tuples in create_obj_patch and rect_patch. Invalid shapes still raise ValueError.

Tests:

• test_visualize_json_exports: JSON round trip of a page with straight boxes, a rotated polygon and layout regions, in interactive and static modes, checking the same patches and labels as the tuple export, plus a KIE page.
• test_page_from_dict_restores_the_image now also calls .show() on a page restored from JSON.

Both fail on main and pass with the fix. ruff check, ruff format --check and mypy doctr/ pass.

Any feedback is welcome 🤗

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.60%. Comparing base (fcff70c) to head (53edba9).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2168      +/-   ##
==========================================
+ Coverage   97.55%   97.60%   +0.05%     
==========================================
  Files         170      170              
  Lines       10668    10740      +72     
==========================================
+ Hits        10407    10483      +76     
+ Misses        261      257       -4     

Flag	Coverage Δ
unittests	97.60% <100.00%> (+0.05%)	⬆️

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[felixdittrich92]

Thanks @MohammadHijjawi97 LGTM 👍