Fix duplicate class and annotation placement lint errors

Classes contributed to by more than one file now carry the `partial`
attribute. trains.lua declared its command as `ExpCommand_Artillery`,
which was a copy paste.

`Color.0` and `MapPosition.0` became `.struct` in fmtk 2.1.6.

emmylua rejects `@type` on a function statement or a `do` block, so
those are moved onto the local or replaced by `@param` and `@return`.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

exp_scenario/module/gui/elements.lua

@@ -25,8 +25,7 @@ Elements.online_player_dropdown = Gui.define("player_dropdown")
     } --[[ @as any ]]
 
 --- To help with caching and avoid context changes the player list from the previous update is remembered
---- @type (string?)[]
-do local _player_names = {}
+do local _player_names = {} --- @type (string?)[]
     --- Updates the player name list after a join or leave
     --- @return (string?)[]
     function Elements.online_player_dropdown._update_player_names()

exp_scenario/module/gui/player_bonus.lua

@@ -47,8 +47,7 @@ Elements.bonus_used = Gui.define("player_bonus/bonus_used")
     :element_data(0) --[[ @as any ]]
 
 --- Value is cached to save perf
---- @type table<number, number>
-do local _points_limit = {}
+do local _points_limit = {} --- @type table<number, number>
     --- Clear the cache for points limit
     --- @param player LuaPlayer
     function Elements.bonus_used._clear_points_limit_cache(player)

exp_scenario/module/gui/science_production.lua

@@ -326,8 +326,7 @@ function Elements.science_table.refresh_row(science_table, row_data)
     Elements.production_label.refresh(row.used, row_data.used)
 end
 
---- @type table<string, { [string]: ExpGui_ScienceProduction.elements.science_table.row_data }>
-do local _row_data = {}
+do local _row_data = {} --- @type table<string, { [string]: ExpGui_ScienceProduction.elements.science_table.row_data }>
     --- Refresh the production tables for all online players
     function Elements.science_table.refresh_online()
         -- Refresh the row data for online forces
@@ -416,8 +415,7 @@ function Elements.eta_label.refresh(eta_label)
     eta_label.tooltip = display_data.tooltip
 end
 
---- @type Elements.eta_label.display_data
-do local _display_data = {}
+do local _display_data = {} --- @type Elements.eta_label.display_data
     --- Refresh the eta label for all online players
     function Elements.eta_label.refresh_online()
         -- Refresh the row data for online forces
@@ -477,8 +475,7 @@ local _fp_one_hour = defines.flow_precision_index.one_hour
 --- @field ten_minutes ExpGui_ScienceProduction._item_data
 --- @field one_hour ExpGui_ScienceProduction._item_data
 
---- @type table<string, { [string]: ExpGui_ScienceProduction.item_production_data }>
-do local _production_data = {}
+do local _production_data = {} --- @type table<string, { [string]: ExpGui_ScienceProduction.item_production_data }>
 
     --- Get the production stats for a force
     --- @param flow_stats any