feat: handle set_param and get_param

[gbrito]

closes: #101

[codecov]

Codecov Report

❌ Patch coverage is 67.90698% with 69 lines in your changes missing coverage. Please review.
✅ Project coverage is 58.59%. Comparing base (78409dd) to head (0754979).

Files with missing lines	Patch %	Lines
src/python.rs	24.13%	22 Missing ⚠️
src/python/completions.rs	34.61%	16 Missing and 1 partial ⚠️
src/backend.rs	66.66%	14 Missing ⚠️
src/index.rs	88.40%	6 Missing and 2 partials ⚠️
src/xml.rs	41.66%	5 Missing and 2 partials ⚠️
src/record.rs	97.22%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #112      +/-   ##
==========================================
+ Coverage   58.10%   58.59%   +0.49%     
==========================================
  Files          28       28              
  Lines        8728     8934     +206     
  Branches     8728     8934     +206     
==========================================
+ Hits         5071     5235     +164     
- Misses       3398     3434      +36     
- Partials      259      265       +6     

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