Improve profile readme rendering (#25988) (#26453)

manual backport of #25988 to v1.20

- Tell the renderer to use the `document` mode, so it's consistent with
other renderers.
- Use the same padding as `.file-view.markup`, so it's consistent with
other containers that contain markup rendering.
- Resolves https://codeberg.org/forgejo/forgejo/issues/833

Co-authored-by: Earl Warren <109468362+earl-warren@users.noreply.github.com>

routers/web/user/profile.go

@@ -115,6 +115,7 @@ func Profile(ctx *context.Context) {
 			profileContent, err := markdown.RenderString(&markup.RenderContext{
 				Ctx:     ctx,
 				GitRepo: gitRepo,
+				Metas:   map[string]string{"mode": "document"},
 			}, bytes)
 			if err != nil {
 				ctx.ServerError("RenderString", err)