Update locales and added missing ones acording ebird suported locales

[wiliamsouza]

I was looking for Brazilian portuguese pt_BR locales because the pt were not working.
But instead only add pt_BR or fix pt maybe adding support to missing locales can help others.
With that in mind this PR add support to all availabe names listed here.

What do you think about document this locales on readme file?

[Josef-Haupt]

Hey thanks for wour work!
These are a lot of files though, I'm not sure if all of them contain a relevant number of translations. Could you check of all of these translations contain atleast 10 percent translated labels? Compared to the en default labels.

[wiliamsouza]

I used the following script:

#!/bin/bash
# Measures file difference percentage 
# First install wdiff
# sudo apt install wdiff

for filename in *.txt; do
    [ -e "$filename" ] || continue
        wdiff -s BirdNET_GLOBAL_6K_V2.4_Labels_en.txt $filename | tail -2
        echo "--------------------------------------------------------------------------------"
done

This is the result percentage.txt

[Josef-Haupt]

Thank you, but could you do the comparison on a line by line basis? It's nice to have more languages, but we want to limit the number of label files in the repository to a certain number, that still leaves the option for users to add more languages locally.