[WIP] Add coloring for Nstr and StrTemplate

[Copilot]

• Analyze NStr and StrTemplate string format and required token types
• Create MultilingualStringSemanticTokensSupplier class to handle NStr/StrTemplate highlighting
• Implement logic to parse and tokenize language keys, separators, and values in NStr strings
• Implement logic to parse and tokenize parameters in StrTemplate strings
• Add comprehensive unit tests for the new supplier
• Run tests to validate implementation
• Request code review

Original prompt

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This section details on the original issue you should resolve

<issue_title>Раскраска Нстр и СтрШаблон</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Раскраска Нстр и СтрШаблон #3687

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