Replace flat PASS/FAIL/WARN text output with a grouped, symbol-based
layout (Environment, Project, Semantic search, Query history). Passing
groups collapse to a single summary line; failing groups expand to show
individual checks with fix hints. Adds --verbose flag to show all checks
including passing ones, color support for TTY terminals, a dedicated
setup-mode report that guides users toward `ktx setup`, and timing info.
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>