[feature] Add first iteration of a user panel at /user (#736)

* start work on user panel

* parse source first before checking if empty form

* newline

* set avi + header nicely

* add posts settings

* render signin a bit nicer on mobile

* return OK json on successful change

* return unauthorized on bad password

* clarify message on insecure password

* make login a bit prettier

* add alt text + border round image previews

* add logout button

* add password change

* styling updates

* redirect /auth/edit to /user

* update tests

* fix validation tests

* better labels, link to more info

* make submit button generic component

* move submit button inside forms

* add autocomplete labels to password fields

* fix indentation (thx eslint)

* update eslintrc

* eslint: no-unescaped-entities

* initial deduplication between user and admin panel

* add default status/post format setting

* user panel styling for inputs

* update user panel styling, include normalize css

* add placeholder text

* input padding

Co-authored-by: f0x <f0x@cthu.lu>

web/source/panels/admin/style.css

@@ -16,22 +16,6 @@
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-body {
-	grid-template-rows: auto 1fr;
-}
-
-.capitalize {
-	text-transform: capitalize;
-}
-
-section {
-	margin-bottom: 1rem;
-}
-
-input, select, textarea {
-	box-sizing: border-box;
-}
-
 section.info {
 	form {
 		grid-template-columns: auto 1fr;
@@ -120,22 +104,3 @@ section.blocks {
 		gap: 0.5rem;
 	}
 }
-
-.error {
-	font-weight: bold;
-}
-
-.hidden {
-	display: none;
-}
-
-.notImplemented {
-	border: 2px solid rgb(70, 79, 88);
-	background: repeating-linear-gradient(
-		-45deg,
-		#525c66,
-		#525c66 10px,
-		rgb(70, 79, 88) 10px,
-		rgb(70, 79, 88) 20px
-	) !important;
-}