fix: improve character death parsing and removing creature prefix

[tobiasehlert]

This pull request includes several changes to the src/TibiaCharactersCharacter.go file and its associated test file src/TibiaCharactersCharacter_test.go. The changes primarily focus on improving string handling, adding new test cases, and updating existing test cases to match the new string handling logic.

String Handling Improvements:

• Added imports for unicode and unicode/utf8 to handle string prefixes and character cases. (src/TibiaCharactersCharacter.go)
• Enhanced the TibiaDataParseKiller function to remove prefixes like "and", "a", and "an" from data strings and handle lowercase characters. (src/TibiaCharactersCharacter.go)

Test Case Updates:

• Updated multiple test cases in TestNumber4 to remove prefixes like "a" and "an" from creature names in death records. (src/TibiaCharactersCharacter_test.go) [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15]

New Test Cases:

• Added TestNumber15 and TestNumber16 to validate the new string handling logic with different character data. (src/TibiaCharactersCharacter_test.go)

fix #455
fix #439
fix #344
fix #341

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 80.29%. Comparing base (086f483) to head (85ebb50).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #456      +/-   ##
==========================================
- Coverage   80.30%   80.29%   -0.02%     
==========================================
  Files          22       22              
  Lines        3686     3694       +8     
==========================================
+ Hits         2960     2966       +6     
- Misses        585      587       +2     
  Partials      141      141              

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud