refactor: consolidate and expand ls function family

- Upgrade ls to long listing (-l -a) and drop the standalone l and lS functions in favor of abbreviations
- Remove llm (ambiguous name, redundant with ltr)
- Add lsr (reversed time oneline), lss (size-sorted), lD (dirs-only), lx (extension-sorted)
- Enhance ltr with --all and age color-scale gradient
- Wire up ls abbreviations: l, lS, lsR, lX, lT, lsT
- Update README functions table and add Listing abbreviations section

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

functions/l.fish

@@ -1,12 +0,0 @@
-# Copyright (C) 2026 Rootiest
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-function l --description 'Long listing, all files'
-    if which eza >/dev/null 2>&1
-        eza --all --long --git --header --icons --color=auto --hyperlink $argv
-    else if which lsd >/dev/null 2>&1
-        lsd --almost-all --long --git --header --hyperlink=auto $argv
-    else
-        command ls --color=auto --almost-all -l $argv
-    end
-end

functions/lD.fish

@@ -0,0 +1,12 @@
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+function lD --description 'List directories only'
+    if which eza >/dev/null 2>&1
+        eza --only-dirs --long --icons --color=auto --hyperlink $argv
+    else if which lsd >/dev/null 2>&1
+        lsd --only-dirs --long --hyperlink=auto $argv
+    else
+        command ls --color=auto -d -- */ $argv
+    end
+end

functions/lS.fish

@@ -1,12 +0,0 @@
-# Copyright (C) 2026 Rootiest
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-function lS --description 'Size-sorted listing'
-    if which eza >/dev/null 2>&1
-        eza --sort=size --icons --color=auto --hyperlink $argv
-    else if which lsd >/dev/null 2>&1
-        lsd --oneline --classic $argv
-    else
-        command ls $argv
-    end
-end

functions/llm.fish

@@ -1,12 +0,0 @@
-# Copyright (C) 2026 Rootiest
-# SPDX-License-Identifier: AGPL-3.0-or-later
-
-function llm --description 'Long listing sorted by modification time'
-    if which eza >/dev/null 2>&1
-        eza --long --sort=modified --git --header --icons --color=auto --hyperlink $argv
-    else if which lsd >/dev/null 2>&1
-        lsd --timesort --long --git --header --hyperlink=auto $argv
-    else
-        command ls --color=auto -lt $argv
-    end
-end

functions/ls.fish

@@ -1,12 +1,12 @@
 # Copyright (C) 2026 Rootiest
 # SPDX-License-Identifier: AGPL-3.0-or-later
 
-function ls --description 'List files'
+function ls --description 'List all files'
     if which eza >/dev/null 2>&1
-        eza --oneline --icons --color=auto --hyperlink $argv
+        eza -l -a --icons --color=auto --hyperlink $argv
 
     else if which lsd >/dev/null 2>&1
-        lsd --hyperlink=auto $argv
+        lsd -l -a --hyperlink=auto $argv
     else
         command ls --color=auto $argv
     end

functions/lsr.fish

@@ -0,0 +1,12 @@
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+function lsr --description 'Reversed time-sorted listing'
+    if which eza >/dev/null 2>&1
+        eza --oneline --sort=modified --reverse --icons --color=auto --hyperlink $argv
+    else if which lsd >/dev/null 2>&1
+        lsd -ltr $argv
+    else
+        command ls --color=auto -ltr $argv
+    end
+end

functions/lss.fish

@@ -0,0 +1,12 @@
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+function lss --description 'Size-sorted listing'
+    if which eza >/dev/null 2>&1
+        eza --oneline --long --all --sort=size --icons --color=auto --hyperlink --color-scale=size --color-scale-mode=gradient $argv
+    else if which lsd >/dev/null 2>&1
+        lsd --oneline --long --all --sort=size --reverse --color=auto --hyperlink=always $argv
+    else
+        command ls $argv
+    end
+end

functions/ltr.fish

@@ -3,9 +3,9 @@
 
 function ltr --description 'Reversed time-sorted listing'
     if which eza >/dev/null 2>&1
-        eza --long --sort=modified --reverse --icons --color=auto --hyperlink $argv
+        eza --long --all --sort=modified --reverse --icons --hyperlink --color=auto --color-scale=age --color-scale-mode=gradient $argv
     else if which lsd >/dev/null 2>&1
-        lsd -ltr $argv
+        lsd --long --all --sort=time --reverse --color=auto --hyperlink=always $argv
     else
         command ls --color=auto -ltr $argv
     end

functions/lx.fish

@@ -0,0 +1,12 @@
+# Copyright (C) 2026 Rootiest
+# SPDX-License-Identifier: AGPL-3.0-or-later
+
+function lx --description 'Extension-sorted listing'
+    if which eza >/dev/null 2>&1
+        eza --long --all --sort=extension --icons --color=auto --hyperlink $argv
+    else if which lsd >/dev/null 2>&1
+        lsd --long --all --sort=extension --hyperlink=auto $argv
+    else
+        command ls --color=auto -lX $argv
+    end
+end