Add DBT "jinja-sql" files to sqlfluff linter

[Cyril Duchon-Doris]

DBT is a popular framework for data modeling and transformations, is is built on SQL with jinja macros, and their official plugin extension records a file type "Jinja SQL", which can be linted with sqlfluff with the DBT templater

Sqlfluff officially supports DBT

# .sqlfluff
[sqlfluff]
dialect = bigquery
templater = dbt

It would be great to add this compatibility out of the box when installing the extension

[Nando Vieira]

Just released v0.0.16 with this. :)