Load pfUI through ClassicAPI's flavor TOCs

ClassicAPI redirects the read of pfUI\pfUI.toc to a flavored file whenever
the DLL is installed, so which TOC the client opens already answers whether
ClassicAPI is there. Split the manifest three ways and let that do the work:

  pfUI.toc             fallback, reached only when ClassicAPI is missing;
                       loads API_Check.lua and nothing else
  pfUI_ClassicAPI.toc  full addon, every non-Turtle client
  pfUI_Turtle.toc      full addon plus init\turtle.xml, on Turtle

The fallback TOC declares no SavedVariables. It used to, while API_Check.lua
reset pfUI_profiles to an empty table on the disabled path -- which truncated
the player's profiles on logout.

With the missing-DLL case handled by TOC selection, API_Check.lua drops the
null object stub that kept the other ~140 files quiet, along with
pfUI_disabled and the now unreachable early return in pfUI.lua. It keeps the
version gate, which still matters: the flavor redirect landed in ClassicAPI
v1.11.0, below the v1.13.1 pfUI needs, so an old DLL still gets served a
flavor TOC. pfUI.lua also loses a verbatim duplicate of the whole check.

Turtle-only files move to init\turtle.xml: modules\turtle-wow.lua (its
TURTLE_WOW_VERSION guard is now redundant) and the lft, turtle_shop,
barbershop, transmog and ebc skins. turtle-wow registers last instead of
75th of 84; the only ordering it relies on is pfUI.chat, registered 8th.

pfSellData moves to env\selldata.lua, listed only in pfUI_ClassicAPI.toc,
since turtle-wow.lua replaces the table wholesale on Turtle. env\tables.lua
keeps an empty declaration so sellvalue.lua has something to index when the
turtle-wow module is disabled.

The release workflow pinned PFUI_CLASSIC_API_LATEST in pfUI.lua, which has
not held that constant since it moved to API_Check.lua, so the pin was
silently doing nothing. It also switches to brues-code/packager@vCAPI, which
recognizes the _ClassicAPI and _Turtle suffixes and applies the TOC build
type filters to them.

.github/workflows/release.yml

@@ -23,12 +23,12 @@ jobs:
           IFS=. read -r MAJOR MINOR PATCH <<<"$LATEST"
           PACKED=$((MAJOR * 10000 + MINOR * 100 + PATCH))
           echo "Pinning PFUI_CLASSIC_API_LATEST to $LATEST ($PACKED)"
-          sed -i "s/^\([[:space:]]*\)local PFUI_CLASSIC_API_LATEST  = .*/\1local PFUI_CLASSIC_API_LATEST  = $PACKED/" pfUI.lua
-          grep 'local PFUI_CLASSIC_API_' pfUI.lua
+          sed -i "s/^\([[:space:]]*\)local PFUI_CLASSIC_API_LATEST  = .*/\1local PFUI_CLASSIC_API_LATEST  = $PACKED/" API_Check.lua
+          grep 'local PFUI_CLASSIC_API_' API_Check.lua
         env:
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Package and release to GitHub
-        uses: BigWigsMods/packager@v2
+        uses: brues-code/packager@vCAPI
         env:
           GITHUB_OAUTH: ${{ secrets.GITHUB_TOKEN }}