Merge entity orientation information of grid, fe values and constraint handler

[termi-official]

We should merge the constraint handler entity orientation api (

Ferrite.jl/src/Dofs/ConstraintHandler.jl

Lines 882 to 887 in 90a5889

	struct PeriodicFacePair
	mirror::FaceIndex
	image::FaceIndex
	rotation::UInt8 # relative rotation of the mirror face counter-clockwise the *image* normal (only relevant in 3D)
	mirrored::Bool # mirrored => opposite normal vectors
	end

) with the grid orientation api (

Ferrite.jl/src/Grid/grid.jl

Lines 1385 to 1432 in 90a5889

	"""
	PathOrientationInfo
	Orientation information for 1D entities.
	The orientation for 1D entities is defined by the indices of the grid nodes
	associated to the vertices. To give an example, the oriented path
	```
	1 ---> 2
	```
	is called *regular*, indicated by `regular=true`, while the oriented path
	```
	2 ---> 1
	```
	is called *inverted*, indicated by `regular=false`.
	"""
	struct PathOrientationInfo
	regular::Bool # Indicator whether the orientation is regular or inverted.
	end
	"""
	SurfaceOrientationInfo
	Orientation information for 2D entities. Such an entity can be
	possibly flipped (i.e. the defining vertex order is reverse to the
	spanning vertex order) and the vertices can be rotated against each other.
	Take for example the faces
	```
	1---2 2---3
	| A | | B |
	4---3 1---4
	```
	which are rotated against each other by 90° (shift index is 1) or the faces
	```
	1---2 2---1
	| A | | B |
	4---3 3---4
	```
	which are flipped against each other. Any combination of these can happen.
	The combination to map this local face to the defining face is encoded with
	this data structure via ``rotate \\circ flip`` where the rotation is indiced by
	the shift index.
	!!!NOTE TODO implement me.
	"""
	struct SurfaceOrientationInfo
	#flipped::Bool
	#shift_index::Int
	end

). Both do essentially the same.

[termi-official]

There is more to consider soon:
#743 (comment)
#743 (comment)