feat(sessions): welcome screen (#3112)

* prototype - can send layout name for new session from session-manager

* feat(sessions): ui for selecting layout for new session in the session-manager

* fix: send available layouts to plugins

* make tests compile

* fix tests

* improve ui

* fix: respect built-in layouts

* ui for built-in layouts

* some cleanups

* style(fmt): rustfmt

* welcome screen ui

* fix: make sure layout config is not shared between sessions

* allow disconnecting other users from current session and killing other sessions

* fix: respect default layout

* add welcome screen layout

* tests(plugins): new api methods

* fix(session-manager): do not quit welcome screen on esc and break

* fix(plugins): adjust permissions

* style(fmt): rustfmt

* style(fmt): fix warnings

1 files changed, 8 insertions, 0 deletions

diff --git a/zellij-utils/assets/layouts/welcome.kdl b/zellij-utils/assets/layouts/welcome.kdl
new file mode 100644
index 000000000..1884fe1f0
--- /dev/null
+++ b/zellij-utils/assets/layouts/welcome.kdl
@@ -0,0 +1,8 @@
+layout {
+    pane borderless=true {
+        plugin location="zellij:session-manager" {
+            welcome_screen true
+        }
+    }
+}
+session_serialization false // this will apply only to the initial welcome screen layout, and is intended to prevent lots of garbage sessions left around