[Feature] Add sqlite supports

[chraac]

In #45, we talk about add the sqlite as an alternative database for some budget machine, here's a quick implementation, detailed changes:

1. Add sqlite database for local use only, usage:

   python bot.py -d sqlite
   

2. Add http proxy supports:

   python bot.py -p ip:port
   

Tested localy on my machine, everything work as expected

[chraac]

@karfly could you review and merge this PR, cause i don't have the write access.

[clemsau]

Have you looked into deploying your own fork ? I am debating the pros and the cons about the usefulness of merging this to the main repo :thinking:

[chraac]

Have you looked into deploying your own fork ? I am debating the pros and the cons about the usefulness of merging this to the main repo 🤔

Emm, tbh, I think it is better to merge it into the upstream since the sqlite is less space consuming for personal usage. But also, I can keep it in my own fork if you guys doubt it's usesfulness.

[madiele]

As a user I'm waiting for this, if this doesn't get merged then some logic to clean old conversation data is really needed IMHO.

[nikbyte]

As for me better to have alternative database engines than create a lot of forks…

[clemsau]

overall lgtm, just need to be tested and waiting for an approval

[chraac]

overall lgtm, just need to be tested and waiting for an approval

Should I initiate the test procedure or just test localy on my machine.

[chraac]

@clemsau could you tell me about how to initiate the test procedure, thks

[PlugFox]

Looking forward for it. MongoDB is a lot for personal and family usage.