fish: more config and functions

cli/.config/fish/functions/gsi.fish

@@ -1,3 +1,3 @@
 function gsi
-    tig status
+    termcompat tig status
 end

cli/.config/fish/functions/s.fish

@@ -0,0 +1,3 @@
+function s
+    termcompat ssh $argv
+end

cli/.config/fish/functions/termcompat.fish

@@ -0,0 +1,15 @@
+function termcompat
+    set -l term $TERM
+    switch $term
+        case 'alacritty*' 'kitty*' 'wezterm' 'xterm-*'
+            set term xterm
+        case 'rxvt-unicode-*'
+            set term rxvt-unicode
+        case 'tmux*'
+            set term screen.xterm-new
+    end
+    begin
+        set -lx TERM $term
+        command $argv
+    end
+end

cli/.config/fish/functions/tig.fish

@@ -0,0 +1,3 @@
+function tig
+    termcompat tig $argv
+end