In-House .Osu and .Osr parser

[VINXIS]

Other parsers (such as ojsama) have much to be desired such as other modes, outdated sr calc, e.t.c. (afaik)

If there's an actual parser that has all the beatmap info available to use and does stuff like stacking properly and everything, then this can be closed without manually implementing it

For .osu parsing:

• Parses beatmap metadata
• Parses beatmap timing points
• Parses objects (circles, sliders, spinners, positions of slider nodes and end)
• Parses stacking
• Parses hitsounds and storyboards
• Calculates SR
• Calculates PP

For .osr parsing (easier one)

• Parses cursor position
• Parses inputs
• Parses hits/misses (properly, including stacks)
• Parses UR