Add pages to the ZIM and display them in the UI

[benoit74]

Fix #7

Changes:

• fetch page content, store in the ZIM, display it
• remove home.json which is not needed anymore, home is just a normal page indeed
• added root page path to shared.json
• added summary page data to shared.json so that we can transform nice looking paths into page id and title
• modified integration test to fetch only a small subtree of the whole website inside the ZIM for quick execution

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 44.82759% with 16 lines in your changes missing coverage. Please review.

Project coverage is 47.22%. Comparing base (18d81f3) to head (c3b6266). Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
scraper/src/libretexts2zim/client.py	28.57%	10 Missing :warning:
scraper/src/libretexts2zim/processor.py	14.28%	6 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #28 +/- ## ========================================== - Coverage 47.54% 47.22% -0.33% ========================================== Files 7 7 Lines 408 432 +24 Branches 40 45 +5 ========================================== + Hits 194 204 +10 - Misses 212 226 +14 Partials 2 2 ```

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[benoit74]

Thank you, still not used to this notation, I keep forgetting about it!