Change the :J describe behaviour to open an editable buffer instead of an input box (#6)

Co-authored-by: fautore <fautore@protonmail.com>

lua/jj/init.lua

@@ -1,6 +1,7 @@
 local M = {}
 local cmd = require("jj.cmd")
 local picker = require("jj.picker")
+local utils = require("jj.utils")
 
 --- Jujutsu plugin configuration
 --- @class jj.Config
@@ -10,6 +11,15 @@ M.config = {
 	picker = {
 		snacks = {},
 	},
+	--- @type jj.utils.highlights Highlight configuration for describe buffer
+	highlights = {
+		added = { fg = "#3fb950", ctermfg = "Green" },
+		modified = { fg = "#56d4dd", ctermfg = "Cyan" },
+		deleted = { fg = "#f85149", ctermfg = "Red" },
+		renamed = { fg = "#d29922", ctermfg = "Yellow" },
+	},
+	--- @type string Editor mode for describe command: "buffer" (Git-style editor) or "input" (simple input prompt)
+	describe_editor = "buffer",
 }
 
 --- Setup the plugin
@@ -17,7 +27,13 @@ M.config = {
 function M.setup(opts)
 	M.config = vim.tbl_deep_extend("force", M.config, opts or {})
 
-	picker.setup(opts.picker)
+	picker.setup(opts and opts.picker or {})
+	utils.setup({ highlights = M.config.highlights })
+	
+	-- Pass describe_editor config to cmd module
+	if opts and opts.describe_editor then
+		cmd.config.describe_editor = opts.describe_editor
+	end
 
 	cmd.register_command()
 end