feat: allow SQLite database backend (#1663)

* simplify leaderboard code, fully abstract database

* update exception catching

* update exception catching and sql references, remove ugc from gamemessages

fix deleting model

remove unrelated changes

Update GameMessages.cpp

* remove ugc from gamemessages

* Update GameMessages.cpp

* Update Leaderboard.cpp

* bug fixes

* fix racing leaderboard

* remove extra stuff

* update

* add sqlite

* use a default for optimizations

* update sqlite

* Fix limits on update and delete

* fix bugs

* use definition to switch between databases

* add switch for different backends

* fix include guard and includes

* always build both

* add mysql if block

* Update Database.cpp

* add new options and add check to prevent overriding mysql

* correct config names

* Update README.md

* Update README.md

* merge to 1 sql file for sqlite database

* move to sqlite folder

* add back mysql migrations

* Update README.md

* add migration to correct the folder name or mysql

* yes aron

* updates

* Update CMakeLists.txt

* dont use paths at all, add where check to only update if folder name still exist

check also doesnt check for slashes and assumes one will be there since it will be.

* default dont auto create account

for releases we can change this flag

* default 0

* add times played query

* fix leaderboard not incrementing on a not better score

* add env vars with defaults for docker

* use an "enum"

* default to mariadb

* Update .env.example

.env.example

@@ -7,8 +7,16 @@ NET_VERSION=171022
 ACCOUNT_MANAGER_SECRET=
 # Should be the externally facing IP of your server host
 EXTERNAL_IP=localhost
+
+# The database type that will be used.
+# Acceptable values are `sqlite`, `mysql`, `mariadb`, `maria`.
+# Case insensitive.
+DATABASE_TYPE=mariadb
+SQLITE_DATABASE_PATH=resServer/dlu.sqlite
+
 # Database values
 # Be careful with special characters here. It is more safe to use normal characters and/or numbers.
 MARIADB_USER=darkflame
 MARIADB_PASSWORD=
 MARIADB_DATABASE=darkflame
+SKIP_ACCOUNT_CREATION=1