* feat: add --jq flag for filtering JSON output across all command types
Add jq expression filtering (--jq / -q) to api, service, and shortcut
commands using gojq. Includes early expression validation, mutual
exclusion checks with --output and non-json --format, pagination+jq
aggregation path, and comprehensive test coverage.
* fix: correct gofmt alignment in jq_test.go struct literal
* fix: downgrade gojq to v0.12.17 to keep Go 1.23 compatibility
gojq v0.12.18 requires Go 1.24, which unnecessarily bumped the project
minimum version. v0.12.17 requires only Go 1.21 and provides the same
jq functionality needed.
* refactor: consolidate jq validation and pagination logic
Extract ValidateJqFlags() and PaginateWithJq() shared functions to
eliminate duplicated jq logic across api, service, and shortcut commands.
* fix: reject --jq for non-JSON responses and propagate shortcut jq errors
- HandleResponse now returns a validation error when --jq is used with
a non-JSON Content-Type instead of silently falling through to binary save.
- Shortcut runtime jq errors are captured in RuntimeContext.outputErr
and propagated as the command exit code, matching api/service behavior.
