:sparkles: Add new REST API parameter: `ftod` (fields to download)

[wlorenzetti]

Closes: #618

Add the capability to the end user to choose how many and which attributes get on /vector/api download REST API.

Adding a new URL parameter ftod=<fields_to_download> inside of wich set the name of attributes to get.

Before

• /vector/api/xls/qdjango/338/buildings_2f43dc1d_6725_42d2_a09b_dd446220104a/

After

• /vector/api/xls/qdjango/338/buildings_2f43dc1d_6725_42d2_a09b_dd446220104a/?ftod=fid,name