Create basic structure for Missions - Setup

[NitBravoA92]

Hi @Kidd254

In this PR, I:

• Create the missionsSlice and Add it to the store.js file. The missionsSlice has the logic to manage the missions' state
• Create the Missions view component. This component will be used to display the Missions page content
• Add a Link for the Missions page in the navigation menu.
• Add a new route for the Missions page in the App.js file
• Update the README.md file.

[Kidd254]

STATUS: APPROVED ✔️ ✔️ 🍾

Hi @NitBravoA92
Your project is complete! There is nothing else to say other than... it's time to merge it
Congratulations! 🎉 👏 👏 💯

To highlight 🍾

• Good job adding the changes in Readme file
• Good job creating the mission page
• Good Job working with React router routes

Cheers and Happy coding!👏👏👏