Add table output to dispatch search

[jongio]

Problem

dispatch search is useful in scripts because it can print JSON or IDs, but it is awkward for a quick terminal read. Users who want a readable list of matching sessions have to pipe JSON through another tool or open the TUI.

Proposed solution

Add --format table and --table to dispatch search. The table should show a compact row per session with ID, last active date, repository, branch, turn count, file count, and summary. Keep JSON as the default and keep --ids unchanged.

Acceptance criteria

• dispatch search auth --format table prints a header and one row per matching session.
• dispatch search auth --table is a shortcut for the same output.
• Empty table results print a header only and exit 0.
• Existing JSON and ID output keep the same shape.
• Tests cover flag parsing and table output.

Complexity

S

Priority

High