feature #12640 [DOCS] Modify serialization fields in api (arti0090)
feature #12640 [DOCS] Modify serialization fields in api (arti0090)

This PR was merged into the 1.10-dev branch.

Discussion
----------

| Q               | A
| --------------- | -----
| Branch?         | master
| Bug fix?        | no
| New feature?    | no
| BC breaks?      | no/
| Deprecations?   | no
| License         | MIT


Commits
-------

54911e25470003db4224df7ed0823dbfe341e58c [DOCS] Modify serialization fields in api
1e7099a2511c51a0392ea8ca0c99bd7127b7f52b Add customization by changing config files
7be7c25e1da23981d633fcefa77b555eb1bba761 lexical fixes and changes for Normalizer example
6c076c138c1810c9e9a37bda80f89f337de51c17 add notes regarding adding/extending existing normalizers
2c93fe9312266e1b91ecd3a8de8758c4051eb6d2 new example and fixes
6c125ea44afe43cd2f6c4a672e37493492b60ba3 Language related fixes

loic425/Sylius,SyliusBot/Sylius,loic425/Sylius,loic425/Sylius,Zales0123/Sylius,antonioperic/Sylius,Arminek/Sylius,GSadee/Sylius,101medialab/Sylius,lchrusciel/Sylius,Sylius/Sylius,antonioperic/Sylius,Arminek/Sylius,Zales0123/Sylius,SyliusBot/Sylius,Arminek/Sylius,Zales0123/Sylius,lchrusciel/Sylius,Sylius/Sylius,diimpp/Sylius,pamil/Sylius,101medialab/Sylius,lchrusciel/Sylius,GSadee/Sylius,diimpp/Sylius,pamil/Sylius,diimpp/Sylius,antonioperic/Sylius,pamil/Sylius,GSadee/Sylius,SyliusBot/Sylius,101medialab/Sylius,Sylius/Sylius