Don't attempt to generate DSL RBIs for test files

[alexcrocha]

Motivation

Attempting to generate DSL RBIs for test files, which are not loaded in development mode, triggers exceptions and leads to unnecessary errors. By skipping test files in our watch configuration, we can prevent these issues.

Implementation

• Updated workspace_did_change_watched_files to skip files ending with _test.rb and _spec.rb, preventing unnecessary processing and exceptions.

• Discovered a bug during pairing with @KaanOzkan: added compact to flat_map to remove nil elements from our array, ensuring the empty? check functions correctly and preventing tapioca dsl from running without arguments.