Feature: Add v21 (novasamatech#3117)

* feat: initial for update to v21

* fix: decrease repetition

* feat: add new check for chains json

* fix: update pre-commit logic

* test new logic

* fix: remove redundant icons

* fix: change char for make file

* feat: add deletion

* test new logic

* fix: do some refactoring

* fix: add description

* fix: update pre-commit

* fix: update chmod for files

* fix: temp remove

* fix: return assets back

* fix: change path

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 repos:
 -   repo: https://github.com/novasamatech/pre-commit-hooks
-    rev: a0eca3e206a0ee7d824489540565ce280c1d2da9
+    rev: c1b66a8fa80dfc7e21aa3c0261fbe190fe68970b
     hooks:
     -   id: check-chains-json
     -   id: end-of-file-fixer