Added a :discouraged-namespace linter check for future times.
Had to add clj-kondo configs for db and outliner since they
were incorrectly inheriting the frontend config, specifically
the :discouraged-namespace linter. Also removed a 'm/=>' in outliner dep
b/c it would've created a complex clj-kondo setup for malli that
would need to be updated for both top-level clj-kondo and deps/outliner
Gabriel Horner