Add auto login on boot

[SRoy89]

Is your feature request related to a problem? Please describe.
I only connect to one ssh client, which is my pi, so clicking 2 extra buttons (new connection & connect) every single time I use my pi is kinda annoying.

Describe the solution you'd like
An option on the settings menu to connect to any "site" on Snowflake startup, would be nice.

Describe alternatives you've considered
An option on the sessions manager>every sites panel, to connect on Snowflake startup, that way multiple sites can be auto connected on startup, and switching to them would be easy.

Additional context
The multi-site startup won't be useful for me, as I only connect to one client. I use my raspberry pi as another computer, so I open it multiple times a day, every day, so it gets kinda annoying. Also, passwords are saved in plain text anyway, so it won't be a security concern than it already is.