Pokemon Silver as a full launcher version, plus launcher mods-list and title-tempo fixes

Silver: derived import manifest (tools/make_silver_manifest.py re-resolves
the Gold manifest's symbols from pokesilver.sym), silver GameVersion row,
generation-keyed extractor routing, required-files override, edition save
stamping (a Silver playthrough no longer writes into the Gold save),
checkver-driven edition data, SILVER/KAMON/OSCAR/MAX presets, GOLD rival
default, edition credits banner, Lugia title screen (OAM layouts, bob,
trail, palettes as title.lua data keys with Gold defaults so old caches
need no re-import), packaging for every build target, docs, and tests.

Launcher: the installed-mods list is one continuous scroll (rows culled to
the viewport) instead of a pager with an inner scroll viewport; the pad
cursor's edge-scroll no longer runs it to the bottom. The game dropdown
shows just the initial and caret. Find-tab behavior unchanged.

Title tempo: a sprite-anim frame shows duration+1 ticks
(engine/sprite_anims/core.asm GetSpriteAnimFrame), which locks both
editions' 64-tick wing beat to the 64-tick sine bob; the title screens no
longer run fast and out of phase.

src/core/gen2/Save.lua

@@ -103,7 +103,7 @@ Save.PLAYER_STATES = {
 }
 
 local function saveNames(version)
-  version = version or "gold"
+  version = version or GameVersion.get()
   -- Resolve the ACTIVE SLOT the same way SaveData does, and only fall back to
   -- the flat save_<version>.lua when no slot is registered.
   --
@@ -133,16 +133,22 @@ local function fs()
   return love.filesystem
 end
 
--- A fresh Gold save.  `opts` carries what the intro collected: player name,
+-- The blank-name fallback is the first PlayerNameArray row, which differs
+-- per edition -- data/player_names.asm:12-23.
+function Save.defaultPlayerName(version)
+  return (version or GameVersion.get()) == "silver" and "SILVER" or "GOLD"
+end
+
+-- A fresh Gen 2 save.  `opts` carries what the intro collected: player name,
 -- rival name, and the options the OPTION screen was left on.
 function Save.newGame(opts)
   opts = opts or {}
   local save = {
     format = Save.FORMAT,
-    version = "gold",
+    version = GameVersion.get(),
     generation = 2,
     player = {
-      name = opts.playerName or "GOLD",
+      name = opts.playerName or Save.defaultPlayerName(),
       -- _ResetWRAM rolls wPlayerID out of hRandomSub/hRandomAdd
       -- (engine/menus/intro_menu.asm:41-49).
       id = opts.trainerId or rand(0, 65535),
@@ -374,10 +380,13 @@ end
 function Save.normalize(save)
   if type(save) ~= "table" then return nil end
   save.format = save.format or Save.FORMAT
-  save.version = "gold"
+  if not (GameVersion.VERSIONS[save.version]
+      and GameVersion.generation(save.version) == 2) then
+    save.version = GameVersion.get()
+  end
   save.generation = 2
   save.player = save.player or {}
-  save.player.name = save.player.name or "GOLD"
+  save.player.name = save.player.name or Save.defaultPlayerName(save.version)
   save.player.id = save.player.id or rand(0, 65535)
   save.player.money = math.max(0, math.min(save.player.money or 0, Save.MAX_MONEY))
   save.player.coins = math.max(0, math.min(save.player.coins or 0, Save.MAX_COINS))
@@ -753,21 +762,24 @@ end
 -- copy is the witness that survives a crash mid-replace.
 function Save.save(save)
   if type(save) ~= "table" then return false, "no save" end
-  if (save.version or "gold") == "gold" then
+  Save.normalize(save)
+  local version = save.version
+  do
     local ok, SaveData = pcall(require, "src.core.SaveData")
-    if ok and SaveData.activeSlot and not SaveData.activeSlot("gold") then
-      local id = SaveData.createSlot and SaveData.createSlot("gold")
-      if id and SaveData.setActiveSlot then SaveData.setActiveSlot("gold", id) end
+    if ok and SaveData.activeSlot and not SaveData.activeSlot(version) then
+      local id = SaveData.createSlot and SaveData.createSlot(version)
+      if id and SaveData.setActiveSlot then
+        SaveData.setActiveSlot(version, id)
+      end
     end
   end
-  local main, backup, tmp = saveNames(save.version)
+  local main, backup, tmp = saveNames(version)
   local f = fs()
   if not f then return false, "no filesystem" end
   -- saveNames may now return a saves/<version>/<slot>.lua path, and
   -- love.filesystem.write does not create missing parent directories.
   local dir = main:match("^(.*)/[^/]+$")
   if dir and f.createDirectory then f.createDirectory(dir) end
-  Save.normalize(save)
   save.savedAt = os.time()
   local encoded = SaveSerializer.encode(save)
   if f.getInfo(main) then