[Feature Request] Add angle and signed angle?

The greetings.

I have forked this master-branch and from this master-branch I have edited math.cs of which you can see here:

https://github.com/quakeulf/Unity.Mathematics/blob/master/src/Unity.Mathematics/math.cs

Specificially from line 98 to line 111 are my additions. I am also including them below this text so you can see in this field of text what I have proposed to add, but cannot, since I cannot seem to figure out how to do a request for pull:

        /// <summary>Returns the angle in degrees from 0 to 180 between two float3s.</summary>
        public static float angle(float3 from, float3 to)
        {
            return math.degrees(math.acos(math.dot(math.normalize(from), math.normalize(to))));
        }
        
        /// <summary>Returns the signed angle in degrees from 180 to -180 between two float3s.</summary>
        public static float anglesigned(float3 from, float3 to)
        {
            float angle = math.acos(math.dot(math.normalize(from), math.normalize(to)));
            float3 cross = math.cross(from, to);
            angle *= math.sign(math.dot(math.up(), cross));
            return math.degrees(angle);
        }

If they are already in there, let me know where. Preferably through documentation on your webcite.

Start with src/Unity.Mathematics/math.cs, especially lines 98-111, and read the surrounding math APIs alongside the discussion for any maintainer decision. Done means the requested angle functionality has an agreed API and is incorporated with verification appropriate to the project.