Add Cloud9 blueprint with Docker Compose and configuration files

- Introduced Docker Compose setup for Cloud9 service, including environment variables and volume configuration.
- Added logo for Cloud9.
- Created template.toml for Cloud9 with default variables for configuration.

blueprints/cloud9/template.toml

@@ -0,0 +1,13 @@
+[variables]
+USERNAME = "user"
+PASSWORD = "${password:16}"
+
+[config]
+[[config.domains]]
+serviceName = "cloud9"
+port = 8000
+host = "${domain}"
+
+[config.env]
+USERNAME = "${USERNAME}"
+PASSWORD = "${PASSWORD}"