UI enhanced

[benoit74]

Fix #2
Fix #9

Also:

• many smaller fixes to make UI as smooth as possible
• add scraper argument to configure default ZIM view (to have optimal rendering for first time a user loads the ZIM title)
• minimal UI to show current coordinates (lat, long) + zoom level, useful among other reasons to find a place coords + to set default view

[codecov]

Codecov Report

❌ Patch coverage is 29.41176% with 12 lines in your changes missing coverage. Please review.
✅ Project coverage is 27.42%. Comparing base (6b6a71f) to head (604be01).
⚠️ Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
scraper/src/maps2zim/entrypoint.py	0.00%	10 Missing ⚠️
scraper/src/maps2zim/processor.py	0.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #21      +/-   ##
==========================================
- Coverage   27.47%   27.42%   -0.06%     
==========================================
  Files          11       11              
  Lines         757      773      +16     
  Branches       93       95       +2     
==========================================
+ Hits          208      212       +4     
- Misses        544      556      +12     
  Partials        5        5              

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