Implement "Rotate canvas (view)"

Description

Real PCB can be rotated at any angle, it would be useful if same could be achieved in pcbnew - rotate viewport in 90 degree angles.

Steps to reproduce

1. Troubleshoot real PCB on the table, where board positioning angle is restricted by IO cables, attached to it. It may happen, that real board may be positioned 180 deg opposite than the view in pcbnew (or +/-90deg). It is harder to match realworld components when pcbnew viewport image does reflect the board on the table;
2. Go to View menu, looking for "View rotation" options, there is no such at the moment.

KiCad Version

Application: KiCad PCB Editor (64-bit)

Version: (6.99.0-1936-gea29c66608), release build

Libraries:
	wxWidgets 3.1.6
	FreeType 2.11.1
	HarfBuzz 4.2.0
	FontConfig 2.14.0
	libcurl/7.83.1-DEV Schannel zlib/1.2.12

Platform: Windows 8 (build 9200), 64-bit edition, 64 bit, Little endian, wxMSW

Build Info:
	Date: May 23 2022 07:28:26
	wxWidgets: 3.1.6 (wchar_t,wx containers)
	Boost: 1.79.0
	OCC: 7.6.0
	Curl: 7.83.1-DEV
	ngspice: 36
	Compiler: Visual C++ 1929 without C++ ABI

Build settings:
	KICAD_USE_OCC=ON
	KICAD_SPICE=ON