feat(cli): add interactive resume command

[jongio]

Summary

Adds dispatch resume, an interactive folder-scoped session picker that resumes the selected session through the same launch path as the TUI.

The picker keeps positional arguments as search text and uses the named --folder option for location filtering, avoiding ambiguous positional paths.

Changes

• List matching sessions in a selectable table with full session ID, summary, repository, and branch.
• Resume the selected session on Enter using existing workspace checks and shell launch behavior.
• Show the first 50 matches and let users reveal additional batches from the picker.
• Support explicit output formats for non-interactive use and --demo before or after the command.
• Sanitize terminal output, including ANSI, control, CSV formula, and Unicode bidi characters.
• Add deterministic screenshots for all themes and publish the picker across the website.
• Update help, man output, README, changelog, shell completions, specs, and test plans.
• Run screenshot-tag tests in CI and mage preflight.

Quality

• go build ./... and mage install pass.
• MQ certification completed with no remaining Critical or High findings.
• All 40 website tests pass; Firefox required retries because of a confirmed Windows headless graphics teardown issue.
• All 13 acceptance criteria are covered and the specification is marked shipped.

Closes #391