Nakoneshniuk/refactor search string processing

[IrynaNakoneshniuk]

Summaries of changes:

• Created the SearchStringService to handle the processing of search strings.

• Moved the search string separators to a configuration file for easier management.

• Integrated SearchStringService into services responsible for filtering data by search string in the admin panel.

  Testing:

• Added unit tests to ensure the correct functionality of SearchStringService.

[sonarcloud[bot]]

Quality Gate passed

Issues
3 New issues
0 Accepted issues

Measures
0 Security Hotspots
83.3% Coverage on New Code
0.3% Duplication on New Code

See analysis details on SonarCloud