Add methods to common structs

[Sunketchupm]

I thought of this a while back and figured it shouldn't be too hard to do. It wasn't, thanks to PeachyPeach's efforts for making the ModFS methods work.
Functions that have their first parameter with a struct will be added as a method onto that struct. For example, set_mario_action will be added onto the MarioState struct and, after a bit of name trimming, can be called by instead doing m:set_action.

Most likely there exists some way to make this work well without being this manual, but it's the best I can do with my knowledge.

Test mod:

---@param m MarioState
local function mario_update(m)
    if m.playerIndex ~= 0 then return end

    local obj = obj_get_nearest_object_with_behavior_id(m.marioObj, id_bhvGoomba)
    if obj then
        if obj:check_hitbox_overlap(m.marioObj) then
            m:set_action(ACT_JUMP_KICK, 0)
        end
    end
end

hook_event(HOOK_MARIO_UPDATE, mario_update)

And it works exactly as would with normal function calls