- Replace Tor-specific implementation with generic SOCKS5 proxy support
- Change `tor_socks` boolean to `socks_port` and `socks_wrapper` parameters
- Move Tor functionality to clan_lib.network.tor submodule
- Add connection context managers to NetworkTechnologyBase
- Improve network abstraction with proper remote() and connection() methods
- Update all callers to use new SOCKS5 proxy interface
- Fix network ping command to properly handle connection contexts
This allows for more flexible proxy configurations beyond just Tor,
while maintaining backward compatibility for Tor usage.
When running for example `clan networks list` we now get a reasonable
error message, instead of:
```
Traceback (most recent call last):
File "/nix/store/8ygq8bfxqydk2917mmg32wy9wb0qzzzd-clan-cli/bin/.clan-wrapped", line 9, in <module>
sys.exit(main())
~~~~^^
File "/nix/store/8ygq8bfxqydk2917mmg32wy9wb0qzzzd-clan-cli/lib/python3.13/site-packages/clan_cli/cli.py", line 516, in main
args.func(args)
~~~~~~~~~^^^^^^
File "/nix/store/8ygq8bfxqydk2917mmg32wy9wb0qzzzd-clan-cli/lib/python3.13/site-packages/clan_cli/network/list.py", line 12, in list_command
networks = networks_from_flake(flake)
File "/nix/store/8ygq8bfxqydk2917mmg32wy9wb0qzzzd-clan-cli/lib/python3.13/site-packages/clan_lib/network/network.py", line 106, in networks_from_flake
networks_ = flake.select("clan.exports.instances.*.networking")
^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'select'
```
This adds a (for now hidden) clan network command that exposes list,
ping, overview subcommands to get informations about configured
networks.
ClanServices can now use the exports to define network specific
information.
This is not the complete feature yet, as we are lacking more tests and
documentation, but merging this now makes it easier to iterate.
