Merge branch 'git-checkout-2801-3⃣-kilt-ext-lib-documentation' of github.com:KILTprotocol/docs into git-checkout-2801-3⃣-kilt-ext-lib-documentation

Signed-off-by: Chris Chinchilla <chris@kilt.io>

# Conflicts:
#	docs/develop/01_sdk/04_integrate/04_extension_api.md

Author: Chris Chinchilla