docs: add README for collection

CODEOWNERS

@@ -1 +1,3 @@
 * @jcgruenhage
+roles @jcgruenhage @madonius
+plugins/modules/matrix_signing_key.py @madonius

README.md

@@ -1,3 +1,23 @@
 # Ansible Collection - famedly.matrix
 
-Documentation for the collection.
+## Modules
+This collection contains a few modules for managing matrix rooms and
+servers, as well as sending notifications from ansible to matrix.
+
+ - **matrix\_login**: Create an access token for a matrix account.
+ - **matrix\_logout**: Invalidates an access token.
+ - **matrix\_notification**: Sends a message to a matrix room.
+ - **matrix\_room**: Idempotently joins/creates a room with a given
+   alias.
+ - **matrix\_state**: Ensures room state has a given content.
+ - **matrix\_signing\_key**: Creates a server signing key.
+
+## Roles
+In addition to the modules, this role *also* contains a few roles for
+deploying commonly used matrix services:
+
+ - **synapse**: Homeserver, this is where your accounts live.
+ - **element**: Web client, for using your accounts.
+
+For details on using these, look at the README.md in the respective
+role directory.

galaxy.yml

@@ -4,6 +4,7 @@ version: 0.1.0
 readme: README.md
 authors:
 - Jan Christian Grünhage <jan.christian@gruenhage.xyz>
+- Emmanouil Kampitakis
 description: roles and modules for managing a matrix.org deployment
 license:
 - AGPL-3.0-only