Add SOT-363

https://github.com/KiCad/kicad-footprints/pull/1959

https://www.jedec.org/sites/default/files/docs/MO-203C.pdf

http://www.ti.com/lit/ml/mpds114c/mpds114c.pdf https://www.analog.com/media/en/package-pcb-resources/package/pkg_pdf/ltc-legacy-sc-70/SOT_6_05-08-1638.pdf https://assets.nexperia.com/documents/outline-drawing/SOT363.pdf

See also discussion at https://github.com/KiCad/kicad-symbols/pull/2256