Add Loot History module

A pfUI-native group-loot roll history window built on ClassicAPI's
C_LootHistory backport, adapted from the anniversary Blizzard reference.

- Movable/scrollable window (ESC-closable, Clear button) listing rolled
  items; each row expands to per-player rolls.
- Item icon/name/quality rendered via the !!!ClassicAPI Item mixin
  (Item:CreateFromItemLink + ContinueOnItemLoad), so uncached items load
  asynchronously and repaint their row.
- Winner shown on the collapsed row (name/roll/roll-type) and marked in the
  expanded list with a checkmark left of the name (matches the reference).
- Expansion state keys on the stable rollID; events (FULL_UPDATE /
  ROLL_CHANGED / ROLL_COMPLETE) drive a rebuild while shown, and re-attach
  the scroll child so a growing list scrolls without a /reload.
- Toggle via /loothistory or /lh; optional auto-show on new rolls behind
  loothistory.autoshow (default off).

env/translations_enUS.lua

@@ -19,6 +19,7 @@ pfUI_translation["enUS"] = {
   ["Align Chat Windows"] = nil,
   ["Aligned Position"] = nil,
   ["All messages will be forwarded to:"] = nil,
+  ["All players passed"] = nil,
   ["Alt-Click Action"] = nil,
   ["Always Allow Drag Via Shift Key"] = nil,
   ["Always Show"] = nil,
@@ -119,6 +120,7 @@ pfUI_translation["enUS"] = {
   ["Chat Bubble Transparency"] = nil,
   ["Chat Default Brackets"] = nil,
   ["Class"] = nil,
+  ["Clear"] = nil,
   ["Clear Rolls"] = nil,
   ["Click Action"] = nil,
   ["Click Casting"] = nil,
@@ -478,6 +480,7 @@ pfUI_translation["enUS"] = {
   ["Look & Feel"] = nil,
   ["Loot"] = nil,
   ["Loot & Spam"] = nil,
+  ["Loot History"] = nil,
   ["Macro Text Color"] = nil,
   ["Macro Text Size"] = nil,
   ["Main Actionbar"] = nil,
@@ -648,6 +651,7 @@ pfUI_translation["enUS"] = {
   ["Resting"] = nil,
   ["Reveal Unexplored Areas"] = nil,
   ["Switch to current zone"] = nil,
+  ["Retrieving item information..."] = nil,
   ["Right"] = nil,
   ["Right Actionbar"] = nil,
   ["Right Anchor"] = nil,