Expose a dedicated RT correction Console command

[htsugawa]

Summary

• expose RT correction as the top-level rtcorrection command
• retain eic rtcorrection as a hidden compatibility path
• move RT correction implementation out of EicProcess into RtCorrectionProcess
• remove the partial capabilities / info feature inventory; standard command help remains the single CLI discovery surface
• add CLI structure and compatibility tests

Validation

• Release/net8 build and tests: 0 errors; 6 tests passed
• Release/net48 build: 0 errors
• root help lists rtcorrection and does not list info or capabilities
• rtcorrection --help succeeds; info and capabilities return exit code 1
• Thermo RAW demo: top-level and legacy commands each exported 1,386 rows; CSV sizes and SHA-256 hashes were identical

[htsugawa]

Updated with the latest master and resolved the RT-correction selection-path conflict from #771 by using ReferenceFileParam.RtCorrectionPeakSelectionFilePath in the new RtCorrectionProcess. Revalidated Release/net8 and Release/net48 builds (0 errors), all 6 Console tests, and the Thermo RAW compatibility run: both command paths produced 1,386 rows and identical SHA-256 hashes.