Selection tool should have a polygonal mode (lp:#1425419)

Original report created by Warren Young (wyoung-9)

The current block selection tools only work for rectangular selections.
Quite often, what I actually need instead is to be able to select odd
shapes. The polygonal selection tools you find in many other drawing
programs solve this problem.

A lasso type selection tool would be an effective alternative, though PCBs
and schematics tend to be geometrically regular, so I don't actually need
all of the freedom allowed by a lasso selection.

The current lack of such a feature often requires multiple operations to
move a block of related parts, purely because you want to leave something
behind that a rectangular selection would otherwise grab.

For the bot:

Application: KiCad Schematic Editor arm64 on arm64

Version: 8.99.0-1554-g8e349eedf0-dirty, debug build

Libraries:
	wxWidgets 3.2.4
	FreeType 2.13.2
	HarfBuzz 8.3.0
	FontConfig 2.15.0
	libcurl/8.4.0 (SecureTransport) LibreSSL/3.3.6 zlib/1.2.11 nghttp2/1.45.1

Platform: macOS Monterey Version 12.7.5 (Build 21H1222), 64 bit, Little endian, wxMac
OpenGL: Apple, Apple M1 Max, 2.1 Metal - 76.3

Build Info:
	Date: Jun 19 2024 16:57:29
	wxWidgets: 3.2.4 (wchar_t,wx containers)
	Boost: 1.84.0
	OCC: 7.7.2
	Curl: 7.79.1
	ngspice: 42
	Compiler: Clang 13.1.6 with C++ ABI 1002

Build settings:
	KICAD_STDLIB_DEBUG=OFF
	KICAD_STDLIB_LIGHT_DEBUG=OFF
	KICAD_SANITIZE_ADDRESS=OFF
	KICAD_SANITIZE_THREADS=OFF