fix(git/cmd): parse :G args with shell-style quoting

lua/git/commit.lua

@@ -4,9 +4,8 @@ local util = require("git.util")
 
 local M = {}
 
----@param opts { amend: boolean? }?
+---@param opts { args: string[]? }?
 function M.commit(opts)
-    local amend = opts and opts.amend or false
     local r = repo.resolve()
     if not r then
         util.error("not in a git repository")
@@ -14,8 +13,8 @@ function M.commit(opts)
     end
 
     local cmd = { "git", "commit" }
-    if amend then
-        table.insert(cmd, "--amend")
+    if opts and opts.args then
+        vim.list_extend(cmd, opts.args)
     end
 
     local proxy_buf, proxy_win