Feat isolation mode

[abnegate]

Allow setting different isolation modes by using different setters

Schema per project:

$database
    ->setDatabase($projectId)
    ->create();

Single schema, unique tables (current arch):

$database
    ->setDatabase('appwrite')
    ->setNamespace($projectId)
    ->create();

Single schema, shared tables:

$database
    ->setDatabase('appwrite')
    ->setShareTables(true)
    ->setTenant($projectId)
    ->create();

[christyjacob4]

Let's setup a test bench to simulate the kind of loads we receive on cloud.

I am mainly concerned about indexes and how they perform before and after this change.

[abnegate]

@christyjacob4 @fogelito For 500K documents, the columns are indexed, and then an equal query is run.

Architecture	Insert Time (s)	Inserts per Second	Query Time (s)
MariaDB	1233.96	405.20	0.0395
MariaDB - Shared	1246.01	401.28	0.0402
MySQL	1479.15	338.03	0.0436
MySQL - Shared	1655.24	302.07	0.0363

And the same for a fulltext index

Architecture	Insert Time (s)	Inserts per Second	Query Time (s)
MariaDB	1233.96	405.20	38.31
MariaDB - Shared	1246.01	401.28	33.50
MySQL	1479.15	338.03	15.29
MySQL - Shared	1655.24	302.07	14.09

Changes made