refactor(git): split status code parsing into status.lua

lua/git/sidebar.lua

@@ -2,6 +2,7 @@ local Revision = require("git.revision")
 local diff = require("git.diff")
 local object = require("git.object")
 local repo = require("git.repo")
+local status = require("git.status")
 local util = require("git.util")
 
 local M = {}
@@ -99,7 +100,7 @@ local function format_entry(entry)
     if not code then
         return nil
     end
-    local char, hl = repo.indicator(code)
+    local char, hl = status.indicator(code)
     if not char then
         return nil
     end
@@ -177,7 +178,7 @@ local function parse_porcelain(stdout)
             if x == "?" and y == "?" then
                 entry.section = "Untracked"
                 table.insert(groups.Untracked, entry)
-            elseif repo.UNMERGED[x .. y] then
+            elseif status.UNMERGED[x .. y] then
                 entry.section = "Unmerged"
                 table.insert(groups.Unmerged, entry)
             else