Fix the ssh logging level.
Currently the ssh commands is printed every time on an ssh connection.
While seeing the command is useful, we should print this when running
clan with the `--debug` flag.
Add a `require_flake` function that checks, if no argument is passed, if
we are in a clan directory.
If not will throw a helpful error.
Before `clan show`:
```
Traceback (most recent call last):
File "/nix/store/8kb3l3yvz6svygnxdlrw5lmd3h3chc8a-clan-cli/bin/.clan-wrapped", line 9, in <module>
sys.exit(main())
~~~~^^
File "/nix/store/8kb3l3yvz6svygnxdlrw5lmd3h3chc8a-clan-cli/lib/python3.13/site-packages/clan_cli/cli.py", line 493, in main
args.func(args)
~~~~~~~~~^^^^^^
File "/nix/store/8kb3l3yvz6svygnxdlrw5lmd3h3chc8a-clan-cli/lib/python3.13/site-packages/clan_cli/clan/show.py", line 12, in show_command
meta = get_clan_details(flake)
File "/nix/store/8kb3l3yvz6svygnxdlrw5lmd3h3chc8a-clan-cli/lib/python3.13/site-packages/clan_lib/clan/get.py", line 22, in get_clan_details
if flake.is_local and not flake.path.exists():
^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'is_local'
```
with `require_flake`:
```
No clan flake found in the current directory or its parents - Use the --flake flag to specify a clan flake path or URL
```
This helps to reduce import cycles in python
If ANY python module from clan_cli is imported all the imports of the __init__.py are executed leading to a lot of cycles
Currently the template help has the following interface:
```
usage: clan [-h] [SUBCOMMAND]
The clan cli tool
positional arguments:
{show,backups,b,flakes,f,templates,flash,ssh,secrets,facts,vars,va,machines,m,vms,select,se,state,st}
show Show meta information about the clan
backups (b) Manage backups of clan machines
flakes (f) Create a clan flake inside the current directory
templates Subcommands to interact with templates
flash Flashes your machine to an USB drive
ssh Ssh to a remote machine
secrets Manage secrets
facts Manage facts
vars (va) Manage vars
machines (m) Manage machines and their configuration
vms Manage virtual machines
select (se) Select nixos values from the flake
state (st) Query state information about machines
options:
-h, --help show this help message and exit
Online reference for the clan cli tool: ]8;;https://docs.clan.lol/reference/cli\https://docs.clan.lol/reference/cli]8;;\
For more detailed information, visit: ]8;;https://docs.clan.lol\https://docs.clan.lol]8;;\
```
