* Create HOWTO.md in Spanish

Translate to spanish

https://github.com/EbookFoundation/free-programming-books/blob/master/HOWTO.md

* Fix minor translation errors

* Translate links of external resources

* Rename HOWTO.es.md to HOWTO-es.md

* Minor translation fixes

* Link to HOWTO-es.md

* Link to HOWTO-es.md

* Link to HOWTO-es.md

* Link to HOWTO-es.md

* Link to HOWTO-es.md

* Link to HOWTO-es.md

* Create HOWTO-fa_IR.md

* add Persian translation link to HOWTO.md

* add Persian translation link to HOWTO-zh.md

* add Persian translation link to HOWTO-zh-TW.md

* add Persian translation link to HOWTO-hi.md

* create HOWTO.pt_br.md

* add spaces and chage order

* add links to other HOWTOs

* add space

* add Portuguese HOWTO to the links

* add Portuguese HOWTO to the links

* add Portuguese HOWTO to the links

* add Portuguese HOWTO to the links

* correct file name

* correct link

* correct link

* correct link

* correct link

added HOWTO.md in Hindi language