fix: cache opts.cwd so it cannot be changed by another function

I'm not sure why but for me opts.cwd reverted back to my home directory
in the make_display function (while it's correct in the gen_from_fd
function). By caching it this way, it works fine 🤷

See also #70

lua/telescope/_extensions/repo/main.lua

@@ -67,6 +67,9 @@ local function gen_from_fd(opts)
         items = { {} },
     })
 
+    -- This prevents opts.cwd from changing later when it’s called in the
+    -- display function
+    local cwd = opts.cwd
     local function make_display(entry)
         local dir = (function(path)
             if path == Path.path.root() then
@@ -83,8 +86,8 @@ local function gen_from_fd(opts)
                 return p:shorten()
             end
 
-            if vim.startswith(path, opts.cwd) and path ~= opts.cwd then
-                return Path:new(p):make_relative(opts.cwd)
+            if vim.startswith(path, cwd) and path ~= cwd then
+                return Path:new(p):make_relative(cwd)
             end
 
             if vim.startswith(path, os_home) then