feat: shared loading state + cleanup loading state management (#5835)

* feat: implement shared loading bar component and polished loading states across the app

* feat: align loading states + ensureQueryData changes

* fix: lint + bugs

* fix: skeleton for manage servers page

* fix: merge conflict fix

packages/ui/src/locales/en-US/index.json

@@ -644,9 +644,6 @@
   "files.layout.extraction-started-title": {
     "defaultMessage": "Extraction started"
   },
-  "files.layout.loading": {
-    "defaultMessage": "Loading files..."
-  },
   "files.layout.selected-count": {
     "defaultMessage": "{count} selected"
   },
@@ -2876,12 +2873,6 @@
   "servers.manage.handle-error.title": {
     "defaultMessage": "An error occurred"
   },
-  "servers.manage.loading-servers": {
-    "defaultMessage": "Loading your servers..."
-  },
-  "servers.manage.loading.serverPanel": {
-    "defaultMessage": "Loading your server panel..."
-  },
   "servers.manage.new-server-button": {
     "defaultMessage": "New server"
   },