docs(wiki): complete end-user manual for GoSurvey 0.5.3 31 pages covering the interface, every registered command, drawing and editing, selection and snapping, coordinate entry, the survey and COGO tools, layouts and plotting, file exchange, settings, workflows, troubleshooting, and the features that are present but unfinished. Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>