friendly-snippets luarock doesn't work

Hello! I'm having some issues using friendly-snippets with this plugin.

I'm using rocks.nvim as my plugin manager, and the `friendly_snippets` config option doesn't seem to pick up the luarock installation automatically. No big deal, that's what `search_paths` is for, right? My current configuration looks something like this:
```
require("snippets").setup {
-- friendly_snippets = true, -- doesn't find the Rocks.nvim installation
create_cmp_source = true,
search_paths = {
vim.fn.stdpath('data') .. '/site/pack/luarocks/opt/friendly-snippets/snippets', -- this is where the snippets are located, but they don't seem to be picked up...
vim.fn.stdpath('config') .. '/snippets', -- if I symlink the directory above to this one it seems to work, but isn't the most portable
}
}
```
The above snippet... doesn't work either. As mentioned in my comments, if I symlink the friendly-snippets location (the same directory that the config evaluates to) to the .config/nvim/snippets directory, it's picked up and lua snippets show up in my completion. My immediate assumption was a permissions error but my user has full read/write on the snippets directory. Maybe the path is too long?
Using rocks-git.nvim to grab the source for friendly-snippets and adding that directory into the `search_path` didn't work, and pointing it to the directory above the snippets where the `package.json` was didn't work either.

I don't really know what else to try, some help would be appreciated!

Reproduce the setup shown in the issue with rocks.nvim, friendly-snippets, and both search_paths entries. Start at require("snippets").setup and trace how the friendly_snippets option and configured paths are resolved; compare the luarock path with the symlinked path. Done means snippets load from the luarock installation without a symlink and the behavior is covered by a regression test.

Written by the indexing model from the issue text.