feat(git): add git module and replace vim-flog with :Glog

lua/core/options.lua

@@ -78,23 +78,8 @@ vim.opt.guicursor:append("a:Cursor")
 vim.opt.inccommand = "split"
 vim.opt.winborder = "rounded"
 
-function _G._status_line_git()
-    local status = vim.b.gitsigns_status_dict
-
-    if not status then
-        return ""
-    end
-
-    local added = status.added or 0
-    local changed = status.changed or 0
-    local removed = status.removed or 0
-
-    return (added + changed + removed) > 0
-        and "%#NvimTreeGitDirty#M%*"
-        or ""
-end
-
-vim.opt.statusline = " %{expand('%:.')} %{%v:lua._status_line_git()%} %3(%m%)"
+require("git").setup()
+vim.opt.statusline = "%{expand('%:.')} %{%v:lua.require('git').status()%} %3(%m%)"
     .. " %="
     .. " %{%v:lua.vim.diagnostic.status()%}"
     .. " %{&filetype} %{&fileencoding} %{&fileformat}"