Floating panes in layouts (#2047)

* work

* tests passing

* tests: floating panes in layouts

* panes(plugins): floating plugins working

* refactor(tab): layout applier

* style(comment): remove outdated

* style(fmt): rustfmt

68 files changed, 2051 insertions, 576 deletions

diff --git a/default-plugins/status-bar/src/second_line.rs b/default-plugins/status-bar/src/second_line.rs
index 4422105da..9b2c23fb6 100644
--- a/default-plugins/status-bar/src/second_line.rs
+++ b/default-plugins/status-bar/src/second_line.rs
@@ -179,7 +179,7 @@ fn get_keys_and_hints(mi: &ModeInfo) -> Vec<(String, String, Vec<Key>)> {
 
         vec![
         (s("Move focus"), s("Move"), focus_keys),
-        (s("New"), s("New"), action_key(&km, &[A::NewTab(None, None), TO_NORMAL])),
+        (s("New"), s("New"), action_key(&km, &[A::NewTab(None, vec![], None), TO_NORMAL])),
         (s("Close"), s("Close"), action_key(&km, &[A::CloseTab, TO_NORMAL])),
         (s("Rename"), s("Rename"),
             action_key(&km, &[A::SwitchToMode(IM::RenameTab), A::TabNameInput(vec![0])])),
@@ -253,7 +253,7 @@ fn get_keys_and_hints(mi: &ModeInfo) -> Vec<(String, String, Vec<Key>)> {
         (s("Split down"), s("Down"), action_key(&km, &[A::NewPane(Some(Dir::Down), None), TO_NORMAL])),
         (s("Split right"), s("Right"), action_key(&km, &[A::NewPane(Some(Dir::Right), None), TO_NORMAL])),
         (s("Fullscreen"), s("Fullscreen"), action_key(&km, &[A::ToggleFocusFullscreen, TO_NORMAL])),
-        (s("New tab"), s("New"), action_key(&km, &[A::NewTab(None, None), TO_NORMAL])),
+        (s("New tab"), s("New"), action_key(&km, &[A::NewTab(None, vec![], None), TO_NORMAL])),
         (s("Rename tab"), s("Rename"),
             action_key(&km, &[A::SwitchToMode(IM::RenameTab), A::TabNameInput(vec![0])])),
         (s("Previous Tab"), s("Previous"), action_key(&km, &[A::GoToPreviousTab, TO_NORMAL])),
diff --git a/zellij-server/src/lib.rs b/zellij-server/src/lib.rs
index 40c2edc2f..bae871f44 100644
--- a/zellij-server/src/lib.rs
+++ b/zellij-server/src/lib.rs
@@ -332,7 +332,7 @@ pub fn start_server(mut os_input: Box<dyn ServerOsApi>, socket_path: PathBuf) {
                     })
                 });
 
-                let spawn_tabs = |tab_layout, tab_name| {
+                let spawn_tabs = |tab_layout, floating_panes_layout, tab_name| {
                     session_data
                         .read()
                         .unwrap()
@@ -342,6 +342,7 @@ pub fn start_server(mut os_input: Box<dyn ServerOsApi>, socket_path: PathBuf) {
                         .send_to_screen(ScreenInstruction::NewTab(
                             default_shell.clone(),
                             tab_layout,
+                            floating_panes_layout,
                             tab_name,
                             client_id,
                         ))
@@ -349,8 +350,12 @@ pub fn start_server(mut os_input: Box<dyn ServerOsApi>, socket_path: PathBuf) {
                 };
 
                 if layout.has_tabs() {
-                    for (tab_name, tab_layout) in layout.tabs() {
-                        spawn_tabs(Some(tab_layout.clone()), tab_name);
+                    for (tab_name, tab_layout, floating_panes_layout) in layout.tabs() {
+                        spawn_tabs(
+                            Some(tab_layout.clone()),
+                            floating_panes_layout.clone(),
+                            tab_name,
+                        );
                     }
 
                     if let Some(focused_tab_index) = layout.focused_tab_index() {
@@ -367,7 +372,7 @@ pub fn start_server(mut os_input: Box<dyn ServerOsApi>, socket_path: PathBuf) {