[wilx]

Regex replacements currently interpret backslashes and dollar signs in interpolated values, corrupting Windows paths and other literal strings. Add an opt-in replacementLiteral parameter to regex-property and each regex-properties setting. When enabled, the plugin applies Matcher.quoteReplacement() before replacing matches. The default remains false, preserving existing replacement syntax and regex matching behavior.

Document the option with a Windows-path example using \A.*\z to replace the input once. Add unit and integration coverage for literal backslashes and dollar signs, null and empty replacements, multiple matches, and existing group substitution.

Fixes #155

Validation checklist:

• Confirmed the new integration regression fails against the original implementation.
• Added and passed regression coverage for both regex-property and regex-properties.
• Applied Spotless formatting and passed git diff --check.
• Passed all 69 unit tests and all 6 regex integration tests with mvn -Dspotless.action=check -Prun-its '-Dinvoker.test=regex-*' -Dinvoker.rerunFailingTestsCount=0 clean verify.
• Documented the parameter and its default, including @since 3.6.2.
• Built the documentation with mvn -DskipReports site and verified that the rendered example preserves the regex backslashes and ${project.build.directory} expression.

Local validation used Linux, Maven 3.9.16, and Eclipse Adoptium Java 26.0.2.