Added newer versions for dependency includes

- Rewritten weapons manager base
- Added new menus
- Modified stock->strange conversion methodology
- Better item giving logic
- Less buggy user interaction
- Rewritten weapon inventory slot modifications data structure; robust
  and better to manage programatically

- Can enable australium on australium-capable items
- Can enable festivizer on festive-capable items

- Custom Killstreak kits are now configurable.
- Moved `MenuHandler` callbacks to another file for better readability.

support
- You can now select unusual effects for your weapon.
- You can now set halloween spells on your weapon depending on class and
  weapon type.

- Added War Paint support
- War Paint indices are now looked up online via JSON to map into the
  plugin's available in-memory list.
- Added new ConVars
	- tf2items_weapons_paintkits_url: Controls the URL where the
	  Paint Kits JSON data is fetched from.
	- tf2items_weapons_search_timeout: Timeout in seconds to allow a
	  client to search for paint kits.
- You can search for paint kits by their name.
- TODO: Add the wear setting to be configurable.
- TODO: Ignore some building weapons.

- The weapons plugin works with databases to save/load user preferences;
  clients can now save their modifications on the server and reload them
  upon joining / manually.
- Saving weapon preferences now works with SQLite.
- Added a new ConVar to control database actions' cooldown time.

- Now featuring database preference saving
- Better cosmetic management
- Better menus
- Added better loading for Unusual effects