feat(object): render author/committer/tagger dates in human form

lua/git/core/util.lua

@@ -120,6 +120,23 @@ function M.split_lines(content)
     return lines
 end
 
+---@param ts integer
+---@param tz string
+---@return string
+function M.format_git_time(ts, tz)
+    local sign, hh, mm = tz:match("^([+-])(%d%d)(%d%d)$")
+    local offset = 0
+    if sign then
+        local h = tonumber(hh) or 0
+        local m = tonumber(mm) or 0
+        offset = math.floor(h * 3600 + m * 60)
+        if sign == "-" then
+            offset = -offset
+        end
+    end
+    return os.date("!%a %b %e %T %Y ", ts + offset) .. tz
+end
+
 ---@param buf integer
 ---@param ns integer
 ---@param lines string[]