SQLite Encryption Extension

[Kinqdos]

Hey there, we are using the sqlite encryption extension (the official encryption from the sqlite team).
I patched the package to support this and I thought maybe someone else would also benefit from this. Patches are more or less forwarding an encryption key down the c code of sqlite.
If the contributors are fine with this, I would open a pr for the changes.
The only important thing to know is, that see is a paid licence. So everyone who has the licence has to replace the sqlite3.h and sqlite3.c with the encrypted one by themself via a patch or something else.

Let me know what you are thinking about this.