Summary

• jtk README rewrite: Added documentation for 19 missing commands/flags including attachments, automation, users search, issues delete/move/types/field-options, sprints add, comments delete, and various undocumented flags. Fixed incorrect content (config set → init, --limit → --max, Go 1.22 → 1.24, old repo release URLs).
• cfl README updates: Added config show/test/clear commands, added --full flag to page view, updated release URLs from old repo to atlassian-cli, updated Go 1.22 → 1.24.
• Root README fixes: Fixed cfl search syntax (cfl page search → cfl search), fixed attachment examples (missing --page flag, wrong download syntax), updated Go 1.21 → 1.24, added jtk users search and automation examples.
• Version bump: Both tools bumped from pre-1.0 (cfl 0.9, jtk 0.1) to 1.0.

Test plan

• Verify CI passes (docs-only change, no Go code affected)
• Spot-check a few commands against --help output to confirm accuracy

Closes #93