Adds a first version of the wiki documentation

Contains:

• CLI user doc
• Assignment creation tutorial
• How to perform exercise tutorial

assigned to @michael.minelli

requested review from @michael.minelli

added 10 commits

• 43ae9dde - dotenv-vault => Update gitignore
• 916effb7 - dotenv-vault => Add package to dev dependencies
• b0823de3 - Add .env.vault file
• a3d03c40 - Package => Modify assets
• df2697ee - App => Replace .env by .env.vault
• 6e775eb4 - CI/CD => Add DOTENV_KEY for production
• a7216e79 - CI/CD => Fix execution of test build
• c0b7a381 - CI/CD => Fix path of the app.ts file
• 9c9e3ff0 - Merge branch 'dotenv-vault-migration' into v2.1.0
• 2ba36d5a - Merge branch 'v2.1.0' into add_wiki_doc

Compare with previous version

added 4 commits

• e1e4f7d3 - added cli
• 04dc8c25 - format
• 3b5cffaa - added cli assignment doc
• 8979e9db - added cli exercise doc

Compare with previous version

added 36 commits

• 8979e9db...217eae33 - 26 earlier commits
• 48cfc239 - added cli
• e63d90ce - format
• c192934e - added cli assignment doc
• cf08355f - added cli exercise doc
• edd30828 - Wiki => Reorganisation
• 2261532e - Gitignore => Add idea files from Wiki
• 5c59bee9 - Wiki => Add dojo project introduction
• bbbd6c87 - Wiki => Complete installation procedure
• 3709df8d - Wiki => Add link to assignment tuto from exercise tuto
• e6ad3784 - Wiki => Add tips to add exercise members at exercise creation

Compare with previous version

merged