chore: add lint for codersdk dependencies (#14638)

scripts/list_dependencies.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+# This script lists all dependencies of a given package, including dependencies
+# of test files.
+
+# Usage: list_dependencies <package>
+
+set -euo pipefail
+
+if [[ "$#" -ne 1 ]]; then
+	echo "Usage: $0 <package>"
+	exit 1
+fi
+
+package="$1"
+all_deps=$(go list -f '{{join .Deps "\n"}}' "$package")
+test_imports=$(go list -f '{{ join .TestImports " " }}' "$package")
+xtest_imports=$(go list -f '{{ join .XTestImports " " }}' "$package")
+
+for pkg in $test_imports $xtest_imports; do
+	deps=$(go list -f '{{join .Deps "\n"}}' "$pkg")
+	all_deps+=$'\n'"$deps"
+done
+
+echo "$all_deps" | sort | uniq