Simplify between_0_360 & between_pm_x from src/utils.rs

[ThibFrgsGmz]

Simplify some functions from src/utils.rs and add more UTs.

• between_0_360: in this version, we use the modulo operator (%) to obtain the remainder of the division of the angle by 360.0. This gives us a number that is necessarily less than 360.0. If this number is negative (which can happen if the angle is negative), we add 360.0 to make it positive. This function therefore always returns a number between 0.0 and 360.0, as desired.

• between_pm_x: this version also uses the modulo operator to normalize the angle, which is more efficient than using a while loop. The unit tests cover several cases: a positive angle greater than x, a negative angle less than -x, an angle already within the interval [-x, x), an angle of zero degrees and an angle of 360 degrees.

• is_diagonal: less cryptic (I reckon lol)

PS: I also updated the settings.json to run clippy and rust-fmt directly from VSCode to enforce their usage and get rid of potential CI issues when pushing to remote.

[ChristopherRabotin]

I never thought of using modulo on floating points, but since it works, it makes sense to use it.