Fix npc message find bug (resolves #2736)

[dudantas]

Description

This solves the problem that a keyword that contains two or more words can be confused with a keyword that contains only one word of the same type in the string.

Behaviour

Actual

Expected

Fixes

Resolves #2736

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)

Checklist

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I checked the PR checks reports
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works

[dudantas]

It will be fixed in pr: https://github.com/opentibiabr/otservbr-global/pull/2712