refactor: content tab styling (#7091)

* refactor: managed content card

* fix: update filter pill styling to be chips-like

* fix: modpack exporting

* fixed: vanilla server projs + header

* refactor: filters

* refactor: detect external file icons + other metadata inside

* refactor: support json5 metadata

* fix: qa

* fix: qa

* fix: fmt + prepr

* fix: fmt

* fix: qa

* fix: headers

* feat: locking

* fix: clippy

* fix: qa

* fix: frozen loc

* fix: shared instances diff calc break

* fix: env filter + remove categories

packages/app-lib/migrations/20260811120000_instance-content-locks.sql

@@ -0,0 +1,6 @@
+CREATE TABLE instance_content_locks (
+	file_id TEXT NOT NULL,
+
+	PRIMARY KEY (file_id),
+	FOREIGN KEY (file_id) REFERENCES instance_files(id) ON DELETE CASCADE
+);