Remove the `layout` component adjust routing to fix console error and conditionally render header elements

[monacodelisa]

Describe the solution you'd like

• get rid of the error in console

ERROR Error: NG04005: Invalid number of '../'
    at createPositionApplyingDoubleDots (router.mjs:996:13)
    at findStartingPositionForTargetGroup (router.mjs:986:10)
    at createUrlTreeFromSegmentGroup (router.mjs:853:20)
    at _Router.createUrlTree (router.mjs:5593:12)
    at get urlTree (router.mjs:6023:24)
    at _RouterLink.updateHref (router.mjs:5994:26)
    at _RouterLink.ngOnChanges (router.mjs:5941:12)
    at _RouterLink.rememberChangeHistoryAndInvokeOnChangesHook (core.mjs:5871:14)
    at callHookInternal (core.mjs:6117:14)
    at callHook (core.mjs:6148:9)

by doing the following:

• remove the layout component
• adjust the routing so there are no child components
• adjust the routing, remove lazy loading, it is not necessary at this point, load components normally
• conditionally render elements from within the main header and display less elements & rows in post-details
• or depending on the app version hide the header and footer and add mini version in post-details
• adjust styling
• adjust [routerLinks] in related components, don't forget sidenav
• depending on the app version - remove mini header from post-details or add footer contents with related styling
• rename the slug of posts to postSlug so that conditional rendering can be matched only to post-details without taking effect on series