Add replaceWithList and regexReplaceWithList filter functions

[sdottaka]

This PR adds replaceWithList and regexReplaceWithList functions to the filter engine.

• Introduces list-based string and regex replacement using tab-separated files
• Supports comments, empty lines, encoding detection, and environment variable expansion
• Optimizes evaluation by preloading replacement lists and regex patterns
• Improves regexreplace optimization by caching compiled regular expressions
• Adds comprehensive unit tests and updates documentation

[Copilot]

Pull request overview

This PR adds two new filter functions (replaceWithList and regexReplaceWithList) to the WinMerge filter engine, enabling list-based string and regex replacements from tab-separated files.

Changes:

• Introduces ReplaceList.h/cpp for loading replacement rules from files
• Adds replaceWithList and regexReplaceWithList functions to the filter engine
• Optimizes regexreplace by caching compiled regular expressions
• Updates documentation across multiple languages

Reviewed changes

Copilot reviewed 10 out of 14 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Src/FilterEngine/ReplaceList.h	New header declaring list loading functions
Src/FilterEngine/ReplaceList.cpp	Implementation of list loading with encoding detection
Src/FilterEngine/FilterExpressionNodes.cpp	New functions and optimization improvements
Testing/GoogleTest/FilterEngine/FilterExpression_test.cpp	Comprehensive unit tests for new features
Docs/Manual/English/Filters.xml	Documentation for new filter functions
Translations/Docs/Manual/*.po	Updated translation files

Comments suppressed due to low confidence (2)

Src/FilterEngine/FilterExpressionNodes.cpp:1247

• The unused variable 'replacements' should be removed from the ReplaceFunc function, as it's declared but never used.

	std::vector<std::pair<Poco::RegularExpression, std::string>> replacements;

Src/FilterEngine/ReplaceList.cpp:2

• The file header comment is incomplete. It should include a brief description of what this file does.

/**
 */

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