add: SSOP-10-1EP_3.9x4.9mm_P1.0mm_EP2.1x3.3mm

A variant of the SSOP-10 package with a thermal pad.

It may also be called ESSOP by some chip makers, but the parameters are the same except for the name.

Some datasheets using this chip:

• CH224K: https://www.lcsc.com/datasheet/lcsc_datasheet_2403131354_WCH-Jiangsu-Qin-Heng-CH224K_C970725.pdf#page=7
• PY32F002AA15M: http://download.py32.org/%E6%95%B0%E6%8D%AE%E6%89%8B%E5%86%8C/zh-CN/PY32F002A%20%E7%B3%BB%E5%88%97%E6%95%B0%E6%8D%AE%E6%89%8B%E5%86%8C_Rev1.0.pdf#page=44

kicad-footprints: kicad-footprints!3633 (merged)

kicad-packages3D-generator: kicad-packages3D-generator!202 (merged)

kicad-footprint-generator: kicad-footprint-generator!1114 (merged)