add documentation for lgt8f88a and lgt8fx8d variants ?

[SuperUserNameMan]

Hello,

https://www.avrfreaks.net/sites/default/files/forum_attachments/LGT8F88A%20V1_1.pdf

[SuperUserNameMan]

Migrating from Atmega88 to LGT8F88A v1.0 : https://www.5hertz.com/pdfs/40001_DI2.pdf

[SuperUserNameMan]

A full chinese datasheet of LGT8fx8D variants :

http://wiki.ocrobot.com/lib/exe/fetch.php?media=ocrobot:alpha:8f328d:lgt8fx8d-series-databook-v1.0.5.pdf

[LaZsolt]

A full, chinese databook v.1.1.1 of LGT8F88A: LGT8F88A_CH_databook_v1.1.1.pdf

[LaZsolt]

LGT8F328D documents added: https://github.com/dbuezas/lgt8fx/wiki#docs--links

LGT8F88A databook not uploaded because of LGT8F88x not supported.