docs: complete the teams FAQ entries in both manuals

The drafted FAQ set was only partly reflected in the pages: the
team-folder-versus-team-space question existed only as a table, the size
limit half of the 'who can add a space' question was missing, and the
list of contributing apps appeared in the user manual only.

Assisted-by: AGENT:claude-opus-5[1m]
Signed-off-by: Anna Larch <anna@nextcloud.com>

Author: miaulalala

admin_manual/configuration_files/team_folders.rst

@@ -93,6 +93,11 @@ Team folders behave differently from ordinary user storage in several areas that
 Frequently asked questions
 --------------------------
 
+**What is the difference between a team folder and a team space?**
+    A team folder is mounted for any number of groups and teams and is administered centrally. A team space is a team
+    folder in an **exclusive** relationship with one team: it belongs to that team, follows its membership, and has
+    its own quota. See the comparison above.
+
 **A user says their team cannot own any files. Is that expected?**
     Yes. A team is a membership list; anything shared with it stays owned by the account that shared it. For storage
     owned by the team, the team needs a space, which its owner can add if provisioning is enabled.
@@ -110,3 +115,11 @@ Frequently asked questions
 
 **Does a team space count against the members' quotas?**
     No. It has its own quota, set per space, where zero means unlimited.
+
+**Can I limit the size of a team space?**
+    Yes. A new space is created with the quota from ``team_folder_default_quota``, and the quota of an existing space
+    can be changed afterwards. Zero means unlimited.
+
+**Which apps can contribute resources to a team?**
+    Files, Talk and Deck out of the box, and any app implementing the team resource provider interface described in
+    the developer manual under *Digging deeper* → *Teams*.

user_manual/groupware/teams.rst

@@ -76,8 +76,10 @@ Frequently asked questions
     Nothing is deleted. The folder and its contents remain, and an administrator can attach it to another team or hand
     it back to individual users. Deleting the space is a separate, destructive action.
 
-**Who can add a team space?**
-    The team owner, or a server administrator. Moderators and admins of the team cannot.
+**Who can add a team space, and can I set a size limit?**
+    The team owner, or a server administrator - moderators and team admins cannot. The space is created with the
+    default size limit your server sets, which may be unlimited; changing it afterwards is an administrator's job, so
+    ask if the space needs to be bigger.
 
 **Can a team have more than one space?**
     No. The relationship is exclusive: one team, at most one team space.