Adds melee damage to guns

[Coxswain-Navigator]

About The Pull Request

MAJOR code refractors :

• attack_speed has been moved up to the /item level, which means that guns can now have a set attack speed
• force_multiplier has been moved up to the /item level. There's pretty much no reason not to. This allows the melee damage of guns to be upgraded through various means.
• Things that previously only improved bullet damage multipliers for guns now also update the force multiplier.

Gun Changes :

• All ego guns now deal approximately 70% of the melee damage you would expect from a melee weapon of the same tier.
• All ego guns now deal a damage type matching the bullet they fire.
• Pistols have a 0.5 attack speed by default.
• All guns now have melee damage statistics as part of their examine text.
• All automatic weapons now check if you are able to attack before firing. This prevents people from firing automatic weapons while simultaneously bashing something with them.

Individual weapon changes :

• Banquet is now a medium sized gun, and has lifesteal on melee hits. It now only consumes health to reload rather than per shot.

Why It's Good For The Game

Guns have to reload and players don't like being a useless wet noodle when that happens.

Changelog

:cl: tweak: all guns now have a melee damage type balance: all guns now have actual melee damage numbers /:cl:

[Kitsunemitsu]

Also technically on freeze as it's a global weapon change and not pertaining to any specific abno(s)

I'll approve it in a few days to be merged on the 1st of Sept.

[InsightfulParasite]

@Kitsunemitsu This is more of your ballpark of weapon tweaks so ill leave this PR to you.