feat: add URL parsing and flexible query options for search

[IssaAlBawwab]

Summary

This PR enhances the search command with new flexible query options as discussed in #159, allowing users to pass URLs from the CERN Open Data portal directly or use more flexible query patterns and facet filtering.

Changes

New Features

• --query option: Accepts full URLs or query strings from CERN Open Data search

  • Automatically parses query parameters, facets, pagination, and sorting
  • Example: --query "q=muon&f=experiment%3ACMS"

• --query-pattern option: Free text search pattern

  • Provides a direct way to specify search terms
  • Example: --query-pattern "Higgs boson"

• --query-facet option: Flexible facet filtering (repeatable)

  • Allows any key-value facet pair, not limited to predefined options
  • Can be repeated multiple times for multiple facets
  • Example: --query-facet experiment CMS --query-facet type Dataset

Implementation Details

• Added parse_query_from_url() function in utils.py to extract parameters from URLs or query strings
• Implemented parameter merging with proper priority:
  1. --query (if provided, extracts all parameters)
  2. --query-pattern (overrides query pattern from --query)
  3. Legacy options (--experiment, --type, --year, --category)
  4. --query-facet (adds/overrides facets)

Closes #159

[codecov]

Codecov Report

❌ Patch coverage is 93.82716% with 5 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.05%. Comparing base (fc54c02) to head (2112baf).

Files with missing lines	Patch %	Lines
cernopendata_client/utils.py	85.71%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #162      +/-   ##
==========================================
+ Coverage   80.75%   82.05%   +1.30%     
==========================================
  Files          12       12              
  Lines         717      797      +80     
==========================================
+ Hits          579      654      +75     
- Misses        138      143       +5     

Files with missing lines	Coverage Δ
cernopendata_client/cli.py	93.80% <100.00%> (+1.03%)	⬆️
cernopendata_client/searcher.py	88.00% <100.00%> (+1.63%)	⬆️
cernopendata_client/utils.py	88.88% <85.71%> (-11.12%)	⬇️

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