Add Thai language dict

[napatswift]

I have added Thai characters dictionary.

[paddle-bot-old[bot]]

Thanks for your contribution!

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
0 out of 14 committers have signed the CLA.

:x: MissPenguin
:x: Evezerest
:x: LDOUBLEV
:x: MikoyChinese
:x: tink2123
:x: littletomatodonkey
:x: Eling486
:x: Rm1n90
:x: ynjang
:x: napatswift
:x: WenmuZhou
:x: paopjian
:x: shawn-AI-Tech
:x: nbswords
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[luotao1]

Could you request this PR to the PaddlePaddle:main branch? Thanks very much!