Update Pangolin CLI to 0.18.0

[github-actions]

Automated update: Pangolin CLI 0.18.0 (plugin version 2026.09.30).

Changes from the Pangolin CLI

• Add support for exit nodes
• Add support for subnet routing
• Add ManagedBy build flag to disable auto-updates whne nessicary by @ToBinio in feat: add ManagedBy build flag to disable auto-updates fosrl/cli#117
• Add --config-file support to site service by @itsjxck in site service: add --config-file support fosrl/cli#149

The new binary passed the plugin smoke test:

PASS: 'pangolin version' runs -> 0.18.0
PASS: subcommand 'up' exists
PASS: subcommand 'down' exists
PASS: subcommand 'status' exists
PASS: 'up' flag '--endpoint' present
PASS: 'up' flag '--id' present
PASS: 'up' flag '--secret' present
PASS: 'up' flag '--attach' present
PASS: 'up' flag '--override-dns' present
PASS: 'up' flag '--upstream-dns' present
PASS: 'up' flag '--interface-name' present
PASS: 'up' flag '--mtu' present

RESULT: PASSED

Review and merge to release. packages/pangolin_cli-2026.09.30.txz and the pangolin_cli.plg MD5 have been rebuilt.