Introduces various features that expand upon the functionality provided by #994, including:

• The ability to define the default level up behaviour of all hands and scoring parameters
• Re-implementation of the level_up_hand function in scoring parameters, allowing scoring params to have their own default behaviour
• Addition of level_up_hand function to Poker Hands, which has the same functionality as the same function in Scoring Parameters, but takes priority over it
• Restructuring of SMODS.upgrade_poker_hands to use default upgrade behaviour if no args.func function is defined
• SMODS.upgrade_poker_hands now passes args.level_up as a parameter into args.func
• New util function SMODS.change_default_hand_upgrade_func which changes the default behaviour for all hands/scoring params
• New util function SMODS.get_default_hand_upgrade_func which creates a function based on the level_up_hand functions from a given hand and scoring param
• This created function takes four params: base, the initial value of the parameter being upgraded, hand, the name of the hand being upgraded, parameter, the name of the scoring parameter being upgraded, and amount, the number the level is being increased by
• SMODS.hand_upgrade_func is the default behaviour of all poker hands and scoring parameters without a defined level_up_hand function; by default it is the following function:

SMODS.hand_upgrade_func = function(base, hand, parameter, amount)
    return math.max(base + G.GAME.hands[hand]['l_' .. parameter] * amount, 0)
end

Additional Info:

• I didn't modify api's or I've made a PR to the wiki repo.
• I didn't modify api's or I've updated lsp definitions.
• I didn't make new lovely files or all new lovely files have appropriate priority.