Tested on game version v04.07.2022, should be compatible with other versions.

Need BepInEx5 to run.
https://github.com/BepInEx/BepInEx

Every option togglable by config file.
If you want a GUI in game to change plugin config rather than config file, use ConfigurationManager.
https://github.com/BepInEx/BepInEx.ConfigurationManager

They are easy to use, only needs to download and put into correct folder under your game installation folder.

Options:

Master All Equipments
Master all equipment you've collected when gaining exp
Same as console mastery max command, but need to attack enemy

Infinite Bullet
Infinite ranged weapon bullet
Well, I forget to check the game's built-in assist tools when making this one.

Ultimate Weapon Always Ready
Ultimate weapon gauge always filled

Unlock Built-in Console
The game has a built-in console, just password protected, I removed the authentication check.
press ~ to open console

Useful console commands:
godmode [on/off]
getmoney [amount]
getresearch [amount]
getitem all (unlock all items in collection)
getitem [item id] (give you the item)
you can see item id in game, displayed above item description or under forge material icon
heal [amount]
kill (kill all enemies)
next (kill all enemies and transist to next map node)
map (show world map)
cleardifficulty (mark current diffculty as cleared)
mastery max
mastery [item id]
skin all