Re-enable the vector from location syntax

[Moderocky]

Description

Re-enables the vector from location syntax. This makes several changes.

The previous pattern was slow and bad because it put two inputs directly next to each other and had no literal "keywords" in the pattern.

Note: the original %vector% [to location] [in] %world% is an example of a nightmare pattern.
Not only can it have two inputs (%vector% and %world%) next to each other, but there is also a possibility for it to have no other content at all.
This is a worst-case scenario since it technically allows any two things that might be a vector or a world to go next to each other, but more importantly, it means the parser has to attempt this for everything.

Changes:

1. The new patterns all have keywords and text separating the inputs.
2. The toString now contains the whole pattern.
3. There is a little test for the syntax.
4. A yaw/pitch will be added to the location if either is provided.
   Previously, both a yaw and a pitch value had to be provided for them to be added, meaning you could specify with yaw 10 but it would not be set if the pitch input happened to be null.
   This has been changed so if either are specified it will set the yaw and pitch (since that is what the user intended to happen) but a zero-value will be substituted for null.
   If neither yaw nor pitch is provided it will return to the old behaviour.

---

Target Minecraft Versions: any
Requirements: none
Related Issues: none

[sovdeeth]

Minor syntax suggestions, looks great!

[APickledWalrus]

Implementation looks good!, but I am not sure I see the point of this syntax...
Is this not what converters are for? I do see the benefit from being able to specify the yaw/pitch for the created location though. Not sure if that is enough justification