Use urllib.parse to check if the URL has a path component. Only append
/api when the path is empty (e.g. https://silo.kindred.internal).
URLs that already include a path (e.g. http://localhost:8080/api) are
left unchanged. Restore localhost placeholder as the default.
- Auto-append /api to base URL if not already present, so users can
enter just the hostname (e.g. https://silo.kindred.internal)
- Load system CA certificate bundle in SSL context so the bundled
Python trusts internal CAs (FreeIPA) without disabling verification
- Update settings dialog placeholder and hint text to clarify expected
URL format
Replace hardcoded FreeCAD addon path searches with __file__-relative
resolution for icons in both InitGui.py and silo_commands.py. Icons now
load correctly regardless of install location.
Add Silo_Settings command with URL and SSL verification fields. Settings
persist via FreeCAD preferences and take priority over env vars. Wire
SSL context into all SiloClient HTTP methods.
