Added Navbar + visual Overhaul

[BlessedLongsword]

I had to reestructurate the whole app in order to use a functional navbar:

• Created root component and moved almost all index logic to root
• Root has all routes and specifies the content in each rout
• Navbar has the navigation bar with the main buttons (login, logout, post recipe)
• This buttons can be accessed from any navbar link
• Postrecipe is now a modal
• Updated visual properties of post recipe and user feed
• Changed some css

I changed a little bit how Images display, tell me what you think, we can improve this in the future, but I mainly did this to have all cards with the same size. We should also look into cropping image instead of resizing it when it has a fixed value.

I am not sure if we want Recipe Detail to look exactly like this with the new setup. @xvxnoah

Navbar is a component, if a main page component, such as login, does not need a navbar, it can be specified by not adding the component in the route. Here's a quick example:

<Route
    path="/"
    element={
      <Container className="my-0 pt-0 pb-4 px-0 min-vh-100">
        <KasulaNavbar></KasulaNavbar>
        <Container className="bg-lightest min-vh-100">
          <UserFeed></UserFeed>
        </Container>
      </Container>
    }
></Route>
<Route path="/login" element={<Login />} />

@ivanmansilla Remember to put a return arrow in Recipe Detail. It should navigate back to the previous screen, NOT FEED. This also applies to Log in, we should change it in the future.

[xvxnoah]

Design wise looks perfect to me, I will leave the task to accept your PR to your frontend colleagues. @guzmanalejandro @andreu-vall @ivanmansilla

[ivanmansilla]

I have accepted the PR because I think it's great especially the issue of the navbar. as a comment I would say that in my opinion I like the header to occupy the entire width of the screen and the issue of transparency in the rest of the screen is fine, if the PO agrees, me too.

[BlessedLongsword]

@ivanmansilla @xvxnoah

This is how it looks when filling the whole screen. If you want to see any change tell me!