feat(file_browser): add support for custom parameters in fd search

[maorun]

Add support for custom parameters in fd search by allowing users to pass in a table of parameters to be included in the fd command. This change provides more flexibility for users who need to customize their search queries in the file browser.

use-case: e.g. max the results on an unlimited depth search:

require('telescope').extensions.file_browser.file_browser({
    path = '%:p:h',
    fd_params = {
        ['--max-results'] = 100,
    },
})