fix: actually allow overriding remotes

ability to override the current branch's remote, which is useful for
getting permalinks that use "origin", and not the temporary fork.

```lua
require('gitlinker').get_buf_range_url('n', {remote = "origin"})
require('gitlinker').get_buf_range_url('n', {remote = "fork"})
```

Author: kylo252

.gitignore

@@ -1 +1,2 @@
 .luacheckcache
+doc/tags

lua/gitlinker.lua

@@ -51,7 +51,7 @@ local function get_buf_range_url_data(mode, user_opts)
     return nil
   end
   mode = mode or "n"
-  local remote = git.get_branch_remote() or user_opts.remote
+  local remote = user_opts.remote or git.get_branch_remote()
   local repo_url_data = git.get_repo_data(remote)
   if not repo_url_data then
     return nil
@@ -138,7 +138,7 @@ function M.get_repo_url(user_opts)
   user_opts = vim.tbl_deep_extend("force", opts.get(), user_opts or {})
 
   local repo_url_data = git.get_repo_data(
-    git.get_branch_remote() or user_opts.remote
+    user_opts.remote or git.get_branch_remote()
   )
   if not repo_url_data then
     return nil

lua/gitlinker/opts.lua

@@ -1,7 +1,7 @@
 local M = {}
 
 local defaults = {
-  remote = "origin", -- force the use of a specific remote
+  remote = nil, -- set it to force the use of a specific remote globally
   add_current_line_on_normal_mode = true, -- if true adds the line nr in the url for normal mode
   action_callback = require("gitlinker.actions").copy_to_clipboard, -- callback for what to do with the url
   print_url = true, -- print the url after action