Add word and line movement in vim normal mode

Add jump to start and end of the document
Move vim tests to relevant vim files
Rename VimTestAppContext to VimTestContext for brevity
Improve VimTestContext assertions to pretty print locations when selection position assertion panics
a7a52ef3f7Keith Simmons committed on 3/28/2022, 12:58:28 AMparent3ae5fc7
10 files changedLine totals unavailable