extensions: Add "Debug Adapters" category to the extension store (#32845)

Closes #ISSUE

Release Notes:

- N/A

crates/collab/migrations.sqlite/20221109000000_test_schema.sql

@@ -465,6 +465,7 @@ CREATE TABLE extension_versions (
     provides_slash_commands BOOLEAN NOT NULL DEFAULT FALSE,
     provides_indexed_docs_providers BOOLEAN NOT NULL DEFAULT FALSE,
     provides_snippets BOOLEAN NOT NULL DEFAULT FALSE,
+    provides_debug_adapters BOOLEAN NOT NULL DEFAULT FALSE,
     PRIMARY KEY (extension_id, version)
 );