docs: add mini.files to supported explorers list

Author: proofer

lua/claudecode/integrations.lua

@@ -1,6 +1,6 @@
 ---
 -- Tree integration module for ClaudeCode.nvim
--- Handles detection and selection of files from nvim-tree, neo-tree, and oil.nvim
+-- Handles detection and selection of files from nvim-tree, neo-tree, mini.files, and oil.nvim
 -- @module claudecode.integrations
 local M = {}