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/ui/gen2/NamePick.lua

@@ -34,8 +34,14 @@ local NamePick = {}
 NamePick.__index = NamePick
 NamePick.isOpaque = true
 
--- data/player_names.asm PlayerNameArray, Gold's half of the IF.
+-- data/player_names.asm PlayerNameArray, one half of the IF per edition.
 local PRESETS = { "GOLD", "HIRO", "TAYLOR", "KARL" }
+local PRESETS_SILVER = { "SILVER", "KAMON", "OSCAR", "MAX" }
+
+local function presetsFor()
+  local silver = require("src.core.GameVersion").get() == "silver"
+  return silver and PRESETS_SILVER or PRESETS
+end
 
 -- menu_coords 0, 0, 10, TEXTBOX_Y - 1 (TEXTBOX_Y = 12).
 local BOX_X1, BOX_Y1, BOX_X2, BOX_Y2 = 0, 0, 10, 11
@@ -60,7 +66,7 @@ function NamePick.new(game, opts)
   self.game = game
   self.onDone = opts.onDone
   self.items = { "NEW NAME" }
-  for _, name in ipairs(opts.presets or PRESETS) do
+  for _, name in ipairs(opts.presets or presetsFor()) do
     self.items[#self.items + 1] = name
   end
   -- `db 1 ; default option`: the cursor starts on NEW NAME, not on a preset.
@@ -106,7 +112,7 @@ function NamePick:openNaming()
       if name and #name > 0 then
         self:choose(name)
       else
-        self:choose(self.items[2] or "GOLD")
+        self:choose(self.items[2] or presetsFor()[1])
       end
     end,
   })
@@ -146,7 +152,7 @@ function NamePick:update(_dt)
       if self.fontOk then
         self:openNaming()
       else
-        self:choose(self.items[2] or "GOLD")
+        self:choose(self.items[2] or presetsFor()[1])
       end
     else
       -- A preset returns through MovePlayerPicLeft, so the pic walks back
@@ -227,5 +233,7 @@ function NamePick:drawWidescreen(winW, winH)
 end
 
 NamePick.PRESETS = PRESETS
+NamePick.PRESETS_SILVER = PRESETS_SILVER
+NamePick.presetsFor = presetsFor
 
 return NamePick