feat: add horizontal scrolling actions (#709)

* feat: add horizontal scrolling actions

* refactor(actions): remove unnecessary use of `nvim_replace_termcodes`

* lint: apply stylua

---------

Co-authored-by: Steven Arcangeli <506791+stevearc@users.noreply.github.com>

Author: jay-rdc

doc/oil.txt

@@ -596,6 +596,12 @@ preview_scroll_down                                  *actions.preview_scroll_dow
 preview_scroll_up                                      *actions.preview_scroll_up*
     Scroll up in the preview window
 
+preview_scroll_left                                  *actions.preview_scroll_left*
+    Scroll left in the preview window
+
+preview_scroll_right                                *actions.preview_scroll_right*
+    Scroll right in the preview window
+
 refresh                                                          *actions.refresh*
     Refresh current directory list
 

lua/oil/actions.lua

@@ -136,6 +136,30 @@ M.preview_scroll_up = {
   end,
 }
 
+M.preview_scroll_left = {
+  desc = "Scroll left in the preview window",
+  callback = function()
+    local winid = util.get_preview_win()
+    if winid then
+      vim.api.nvim_win_call(winid, function()
+        vim.cmd.normal({ "zH", bang = true })
+      end)
+    end
+  end,
+}
+
+M.preview_scroll_right = {
+  desc = "Scroll right in the preview window",
+  callback = function()
+    local winid = util.get_preview_win()
+    if winid then
+      vim.api.nvim_win_call(winid, function()
+        vim.cmd.normal({ "zL", bang = true })
+      end)
+    end
+  end,
+}
+
 M.parent = {
   desc = "Navigate to the parent path",
   callback = oil.open,