DOCS-#3692: Improve Out-of-Core docs (#3705)
DOCS-#3692: Improve Out-of-Core docs (#3705)

Co-authored-by: Devin Petersohn <e41d922d64ec26f8c15a61d82491163039f96156@users.noreply.github.com>
Co-authored-by: Vasily Litvinov <45989785b2757b7086737df70fb2aa6a7ade2d75@intel.com>
Co-authored-by: Rehan Sohail Durrani <63d4e525a811f0ed32e05e68ebb8779f742d150e@berkeley.edu>
Signed-off-by: Doris Lee <c110c497f2167bf413e8fff527800e3b9f616b99@gmail.com>
modin-project/modin,modin-project/modin