Add support for different database types

[fabyte]

Initially, MySQL/MariaDb and SQLite are supported.

Tested for SQLite on the following system:

$ lsb_release -a
No LSB modules are available.
Distributor ID: Raspbian
Description:    Raspbian GNU/Linux 10 (buster)
Release:        10
Codename:       buster

$ python --version
Python 3.9.1

No problems occured for a sqlite database with >4 million rows.

[CarlosGS]

This is a convenient addition, tested and I think it could be merged. It worked great with SQLite and a 800Mb home-assistant_v2.db file, thanks @fabyte! Note, maybe remove the (you need to get rid of the first three `add_argument` calls above) to prevent confusion.

@dseifert THANK YOU so much for taking the time to share and document your script! It is extremely useful, and exactly as you wrote: "if you only figure this out after already having assembled a huge amount of historical data, there is no option to migrate your data" 🤦 PS: If I may suggest a small addition to the last part of the readme: "In this influxdb.yaml you may need to replace the default host "a0d7b954-influxdb" with "homeassistant.local". Thanks again!

[jonasdiemer]

Also tested today with sqlite3 - no problems. This PR should be merged (I only found it after I did modifications myself).