refactor: introduce PageHeader component (#6629)

* refactor: introduce PageHeader component

* feat: split up according to component structure guide

* fix: lint

* fix: label inconsistencies

* feat: refactor PageHeader (again)

* refactor: old impls

* fix: changes

* fix: rescan

* fix: prepr

* fix: dedupe

* fix: rev

* fix: lint

* fix: lint

---------

Co-authored-by: Prospector <6166773+Prospector@users.noreply.github.com>

apps/frontend/src/locales/no-NO/index.json

@@ -2678,9 +2678,6 @@
   "profile.label.collection": {
     "message": "Samling"
   },
-  "profile.label.downloads": {
-    "message": "{count} {countPlural, plural, one {nedlasting} other {nedlastinger}}"
-  },
   "profile.label.joined": {
     "message": "Blei med"
   },
@@ -2699,9 +2696,6 @@
   "profile.label.organizations": {
     "message": "Organisasjoner"
   },
-  "profile.label.projects": {
-    "message": "{count} {countPlural, plural, one {projekt} other {projekt}}"
-  },
   "profile.label.saving": {
     "message": "Lagrer..."
   },
@@ -3038,12 +3032,6 @@
   "project.settings.visit-dashboard": {
     "message": "Besøk prosjekt-dashbordet"
   },
-  "project.stats.downloads-label": {
-    "message": "{count, plural, one {nedlasting} other {nedlastinger}}"
-  },
-  "project.stats.followers-label": {
-    "message": "{count, plural, one {følger} other {følgere}}"
-  },
   "project.status.archived.message": {
     "message": "{title} har blitt arkivert. {title} kommer ikke til å få noen nye oppdateringer, hvis ikke forfatteren bestemmer seg for å dearkivere prosjektet."
   },