Kourou 1.0: Fixes, refacto and test migration

[OlivierCavadenti]

Fixes:

• config:diff : Bug when displaying differences between object values (with the --values flag)
• redis:list-keys : There is a bug in the command when no matching key is found

Renaming:

• api-key:create : The description flag should be an argument
• api-key:search : The filter flag should be named query
• kourou sdk:execute : Should be renamed to kourou execute
• sdk:query : Should be renamed to api and the automatic inference of commands as API action should be removed
• app:start-services : Should be renamed in services:start and a flag should be added to specify Docker Compose project name

Flag adds:

• document:search : The aggregations flag should be added (maybe just name it aggs)
• export:user : A --mappings flag should be added to export mappings (and the former mappings related commands should be removed)

Removed:

• *:export : Export commands should all be in the export: namespace (e.g. index:export => export:index)
• *:import : Import commands should be deleted and only the global import command should be kept
• instance:* : Instance commands should be removed since they are obsolete with kaaf

Others:

• Remove --editor options for "execute" and "api"
• Clean up packages and update versions

Cucumber to Jest migration:

• [X] Install Jest
• [X] Init contest for Jest tests (Kuzzle SDK)
• [ ] migrate api-key tests

Closes #88