Add default values for the database columns

Implement our own database ORM, and update the whole code to use it

Entirely replace LiteSQL

fix #3271

Find sqlite3 instead of litesql

Simplifies the CMakeLists.txt a little bit

Test that the archlinux package actually installs at least /usr/bin/biboumi

Change the makepkg command used in the archlinux CI test

Move biboumi.h.cmake inside the src/ directory

Fix the date format in the RPM spec file

Release version 5.0

Add biboumi-test-archlinux and biboumi-debian-packaging Dockerfiles

Fix the make command instruction in INSTALL.rst

Add a e2e to check that timestamps in MAM requests are correctly handled

fix #3266

Fix the datetime parsing to handle optional fractions of seconds

fix #3266

Better document the identd server

Do not call pkg_check_module if the MODULE_FOUND is already cached

Remove a few warnings occuring in some build config

The RPM doesn’t contain biboumi.cfg anymore

Do not install biboumi.cfg in /etc/biboumi/

Because it would overwrite the user file when installing a new version.  And
it’s basically useless anyway, because if the file doesn’t exist at all,
biboumi will write an helpful message on stderr, telling the user to create
the config file.

Handle messages 367 and 368 to display the banlist in the MUC

fix #3234

Refactor the channel::self to point at the existing user

This way, the user is always up to date, instead of being a duplicate out of
sync.

fix #3258

Redirect welcome NOTICE to their channel, instead of sending a global one

fix #3236