[Cleanup] Number Precision And Decimal Separator Adjusting

[Civolilah]

@beganovich @turbo124 The PR includes adjustments for decimal precision and separators on various functionalities such as invoicing products, projects, tasks, etc. The value used for decimal precision will be the one entered in User Details => Preferences. If no value is entered, the default precision will be 2. Another part of the adjustment concerns separators. For example, when creating notes while invoicing a project, we will use the separator as defined in the Localization settings. Let me know your thoughts.

Closes #2057