Port to Ascension 3.3.5 client

- Interface: 11200 -> 30300, add -coa1 version suffix and CoA metadata
  in VanillaGuide.toc.
- Local-shadow arg = {...} inside Di/Dv debug helpers in Core.lua so
  vararg access works under Lua 5.1 (WoW 3.3.5) instead of Lua 5.0
  (WoW 1.12).
- Add README-CoA.md documenting fork rationale, patched files, and
  remaining TODO (in-game smoke test, MetaMap -> pfQuest retarget,
  CoA-custom content slot, dynamic-scaling picker UX).

README-CoA.md

@@ -0,0 +1,62 @@
+CoA VanillaGuide
+================
+
+This is the CoA Guild 'Exiles' fork of [VanillaGuide][upstream] by
+mrmr (rsheep@gmail.com), imported from the 1.04.2 release archive
+dated 2015-03-29. Upstream is unmaintained since 2015.
+
+[upstream]: https://github.com/rsheep/VanillaGuide
+
+The original addon targets Vanilla 1.12.1 (`Interface: 11200`). This
+fork ports it to the Ascension 3.3.5 / Voljin client
+(`Interface: 30300`) so it can be loaded alongside the rest of the
+CoA addon set.
+
+What we patched
+---------------
+
+**1. Interface bump.** `VanillaGuide.toc` now declares
+`Interface: 30300` and adds a `-coa1` suffix on the version line, matching
+the convention of the other `coa-*` forks (see e.g. coa-bartender).
+
+**2. Lua 5.0 → 5.1 vararg fix.** WoW 1.12 ships Lua 5.0, which exposes
+varargs as an implicit `arg` table. WoW 3.3.5 ships Lua 5.1, where
+that table is gone — varargs are `{...}` or `select()`. The two debug
+print helpers in `Core.lua` (`Di`, `Dv`) used the 5.0 form and would
+have thrown `attempt to index global 'arg' (a nil value)` on every
+debug call. Local-shadow `arg = {...}` keeps the rest of each function
+unchanged.
+
+What is still TODO
+------------------
+
+- **In-game smoke test.** The addon has not yet been loaded against
+  the Ascension client. Expect further small breakage (frame APIs,
+  `GetAddOnInfo` signature, possibly map-zone coords) once we drive it
+  through `/vguide`.
+- **MetaMapBWP integration.** MetaMap doesn't exist on 3.3.5. The
+  hooks in `Settings.lua` and `Frame_SettingsFrame.lua` are gated
+  behind `IsAddOnLoaded("MetaMap")` so they're effectively dead, but
+  we'll want to retarget them at **pfQuest** (already in the CoA addon
+  set) for waypoints and quest markers.
+- **Dynamic-level-scaling content.** Ascension scales every starting
+  zone to the player, so all six vanilla starting zones are viable
+  end-to-end. Joana's faction-locked H/A split still applies (quest
+  givers are still faction-restricted), but the early-game chain
+  doesn't have to funnel through the "correct" 1-12 zone first. We
+  keep the H/A split and lean into the picker to show all three
+  per-faction starting zones up front.
+- **CoA-custom content slot.** No CoA-specific zones or events are
+  wired in yet. Once the port is verified, we add a separate
+  `GuideTables/CoA/` directory for guild content (Heroes of Ascension
+  events, mutated-class side notes, etc.) so upstream patches can
+  still merge cleanly into the Joana / Brian Kopps trees.
+
+Files we touched
+----------------
+
+- `VanillaGuide.toc` — Interface bump, CoA metadata.
+- `Core.lua` — local-shadow `arg = {...}` inside `Di` and `Dv`.
+- `README-CoA.md` — this file.
+
+Everything else is the unmodified 1.04.2 import.