fix(previewer): improve binary mime type check (#3083)

* fix(previewer): improve binary mime type check

Problem: mime type for a ts/js file can either return `text/plain` or
`application/javascript` based on the contents of the file.
Previously, this meant `application/javascript` would be considered
"possibly binary". This, in conjunction with how `vim.filetype.match`
does not give a result for a filename that ends in `.ts`, would lead to
a typescript file taking the path of `check_mime_type` and eventually
`mime_hook`.

Solution: Include `application/javascript` as a non-binary file type
during mime type check.

* [docgen] Update doc/telescope.txt
skip-checks: true

---------

Co-authored-by: Github Actions <actions@github>

lua/telescope/previewers/buffer_previewer.lua

@@ -168,9 +168,8 @@ local handle_file_preview = function(filepath, bufnr, stat, opts)
     end
     if opts.preview.check_mime_type == true and has_file and (opts.ft == nil or opts.ft == "") then
       -- avoid SIGABRT in buffer previewer happening with utils.get_os_command_output
-      local output = capture(string.format([[file --mime-type -b "%s"]], filepath))
-      local mime_type = vim.split(output, "/")
-      if mime_type[1] ~= "text" and mime_type[1] ~= "inode" and mime_type[2] ~= "json" then
+      local mime_type = capture(string.format([[file --mime-type -b "%s"]], filepath))
+      if putils.binary_mime_type(mime_type) then
         if type(opts.preview.mime_hook) == "function" then
           opts.preview.mime_hook(filepath, bufnr, opts)
           return