feat: Add docs/readme.md + update crosslinks (#6700)

* complete translate list with the new languages appeared since hacktoberfest

* Create docs/README.md with the translations section

using root README.md as source. Links are adapted to this folder

Address EbookFoundation/free-programming-books#6698

* fix remaining url + translation items

- Portuguese (Portugal)
- Slovak / slovenčina
- Slovenian / slovenščina

Address EbookFoundation/free-programming-books#6698

* fix remaining url + translation items

- Portuguese (Portugal)
- Slovak / slovenčina
- Slovenian / slovenščina

Address EbookFoundation/free-programming-books#6698

* Add inclusiveness `dare to translate...` paragraph

* Add inclusiveness `dare to translate...` paragraph

* Move translations link target url to docs

* move translation links `bs`

* move translations link `en`

* move translations crosslink `es`

* move translations crosslink `fr`

* move translations crosslink `de`

* move translations crosslink `el`

* move translations crosslink `fa_IR`

* move translations crosslink `fil`

* move translations crosslink `it`

* move translations crosslink `pt_BR`

* move translations crosslink `ko`

* move translations crosslink `ru`

* move translations crosslink `id`

* move translations crosslink `zh`

* move translations crosslink `hi`

* move translations crosslink `pl`

* move translations crosslink `uk`

* move translations crosslink `vi`

* move translations crosslink remaining `HOW-To's`

* revert feature moved to #6688

* Remove the list from the top level. Leave `en` links

* use `previous languages` in root README

* Add more languages lists in root `readme.md`

* fix typo

* fix typo

* Update docs/README.md after translations paragraph

Less text is more

Co-authored-by: Eric Hellman <eric@hellman.net>

* Update README.md after translations paragraph 

Less text is more

Co-authored-by: Eric Hellman <eric@hellman.net>

* Update README.md preface translations paragraph 

Co-authored-by: Eric Hellman <eric@hellman.net>

* fix CONTRIBUTING target url commited at fd2b39151c

* Update docs/README.md preface translations paragraph 

Co-authored-by: Eric Hellman <eric@hellman.net>

* read me! said the boss ^^,

less text is more.

Co-authored-by: Eric Hellman <eric@hellman.net>

* remove "The inclusiveness is one of our targets, so "

Co-authored-by: Eric Hellman <eric@hellman.net>

docs/HOWTO-sl.md

@@ -1,4 +1,4 @@
-*[Preberite to v drugih jezikih](../README.md#translations)*
+*[Preberite to v drugih jezikih](README.md#translations)*
 
 Dobrodošli v zbirki Free-Programming-Books! Lepo pozdravljeni vsi novi programerji - tudi tisti, ki boste na Githubu ustvarili vaš prvi zahtevek potega (pull-request). Če ste eden izmed njih, vam pri tem lahko pomaga nekaj virov:
 
@@ -14,4 +14,4 @@ Ne oklevajte in postavljajte vprašanja; vsak programer je enkrat začel s svoji
 
 Tudi če ste izkušeni na področju programiranja odprte kode, se bodo zagotovo našle zadeve, ki vas lahko malce zaustavijo. Ko oddate PR, bo GitHub Actions zagnal pregledovalnik, ki pogosto najde manjše težave z razmikom ali abecedo. Če se vam prikaže zeleni gumb, je vse pripravljeno za pregled. Če se zeleni gumb ne prikaže, kliknite »Podrobnosti« pod kljukico, ki je ugotovila, kaj pregledovalniku ni bilo všeč. Odpravite težavo in dodajte zahtevo (commit) v PR.
 
-Če niste prepričani, da je vir, ki ga želite dodati, primeren za zbirko Free-Programming-Books, preberite smernice v [CONTRIBUTING](CONTRIBUTING.md). ([translations](../README.md#translations))
+Če niste prepričani, da je vir, ki ga želite dodati, primeren za zbirko Free-Programming-Books, preberite smernice v [CONTRIBUTING](CONTRIBUTING.md). ([translations](README.md#translations))