[v7.0/forgejo] Add optional pronoun field in user settings (#3076)

**Backport:** https://codeberg.org/forgejo/forgejo/pulls/1518

An attempt at adding an optional pronoun field for user profiles, as suggested here 3 years ago: https://github.com/go-gitea/gitea/issues/13990

![A Forgejo profile showing pronouns to the right of the user's username](/attachments/2e5ff300-d333-46db-9074-f030f199843c)

I made this for [my own instance](https://git.gay/h) and didn't initially think I'd make a PR because of the previous closed issue, but I thought I'd ask the Forgejo matrix chat to see if there was any support and there was!

I'm told I should make a database migration, some help as to how to do that would be appreciated.

Co-authored-by: hazycora <hazysu@riseup.net>
Co-authored-by: Gergely Nagy <forgejo@gergo.csillger.hu>
Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/3076
Reviewed-by: Earl Warren <earl-warren@noreply.codeberg.org>
Co-authored-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>
Co-committed-by: forgejo-backport-action <forgejo-backport-action@noreply.codeberg.org>

templates/shared/user/profile_big_avatar.tmpl

@@ -13,7 +13,7 @@
 	</div>
 	<div class="content gt-word-break profile-avatar-name">
 		{{if .ContextUser.FullName}}<span class="header text center">{{.ContextUser.FullName}}</span>{{end}}
-		<span class="username text center">{{.ContextUser.Name}} {{if .IsAdmin}}
+		<span class="username text center">{{.ContextUser.Name}}{{if .ContextUser.Pronouns}} · {{.ContextUser.Pronouns}}{{end}} {{if .IsAdmin}}
 					<a class="muted" href="{{AppSubUrl}}/admin/users/{{.ContextUser.ID}}" data-tooltip-content="{{ctx.Locale.Tr "admin.users.details"}}">
 						{{svg "octicon-gear" 18}}
 					</a>