add dialog to import a modlist

[Terpo]

supported types
[1,2,3,4,5]

or modpacks by twitch: https://www.curseforge.com/minecraft/modpacks/all-the-mods-4/files/2898550

{
"minecraft": {
"version": "1.14.4",
"modLoaders": [
{
"id": "forge-28.2.3",
"primary": true
}
]
},
"manifestType": "minecraftModpack",
"manifestVersion": 1,
"name": "All the Mods 4",
"version": "1.1",
"author": "ATMTeam",
"projectID": 316059,
"files": [
{
"projectID": 260262,
"fileID": 2815691,
"required": true
},
{
"projectID": 264738,
"fileID": 2781099,
"required": true
}
]
}