terminal: Add fzf file insertion and zoxide cd key binds

The following is added to all three shells bash, zsh, nushell:

Pressing c-t at any time lets you insert a file/dir at the current
cursor location using fzf. Same for 'T' in vicmd mode.

Pressing alt-c at any time lets you jump to that directory using zoxide,
with the zle editor content intact. Same for 'C' in vicmd mode.

Zsh implementation from: https://github.com/ajeetdsouza/zoxide/issues/357
Bash implementation: https://github.com/ajeetdsouza/zoxide/issues/516

Nushell implementation taken from: https://github.com/junegunn/fzf/issues/4122

TODO: Nushell fzf mapping has one problem in that it does not quote the
selected file in any way. So any file with e.g. a space in it will have
to be manually fixed afterwards.

terminal/.config/nushell/config.nu

@@ -38,18 +38,18 @@ zoxide init nushell | save -f ($nu.data-dir | path join "vendor/autoload/zoxide.
 # load carapace completions
 source ~/.cache/carapace/init.nu
 
-
 # keybinds
 $env.config.keybindings = [
     { modifier: control keycode: char_o mode: [emacs, vi_normal, vi_insert] event: null },
     {
         name: clear_screen
-        modifier: control
-        keycode: char_t
+        modifier: alt
+        keycode: char_l
         mode: ["emacs", "vi_normal", "vi_insert"]
-        event: {
-            send: ClearScreen
-        }
+        event: [
+            {edit: Clear}
+            {send: Enter}
+        ]
     }
     {
         name: open_editor
@@ -60,6 +60,41 @@ $env.config.keybindings = [
             send: OpenEditor
         }
     }
+    {
+        name: run_zoxide
+        modifier: alt
+        keycode: char_c
+        mode: ["emacs", "vi_normal", "vi_insert"]
+        event: {
+            send: executehostcommand
+            cmd: "zoxide query --interactive"
+        }
+    }
+    {
+        name: run_zoxide_vicmd
+        modifier: shift
+        keycode: char_c
+        mode: [ "vi_normal"]
+        event: {
+            send: executehostcommand
+            cmd: "zoxide query --interactive"
+        }
+    }
+    {
+        name: insert_file_fzf
+        modifier: control
+        keycode: char_t
+        mode: ["emacs", "vi_normal", "vi_insert"]
+        event: {
+            send: executehostcommand
+            cmd: "
+              let fzf_ctrl_t_command = \$\"fd --type file --hidden | fzf --preview 'bat --color=always --style=full --line-range=:500 {}' \";
+              let result = nu -l -i -c $fzf_ctrl_t_command;
+              commandline edit --append $result;
+              commandline set-cursor --end
+            "
+        }
+    }
 ]
 
 alias l = ls