v2.7

Breaking

• CLI: reworked the --json fields and exit codes. Scripts reading either need updating.
• Only Maskrom devices are listed; Loader and ADB boards are ignored.

Fixed

• App icon rendered oversized; now on Apple's 824/1024 grid.
• GUI listed an unrelated chip's cfgs with no device connected.
• --solder no longer runs an ambiguous cfg match.

Full Changelog: v2.6...v2.7