Minecraft Java: FTB New Source Modpacks: Read Server type/version from ".manifest.json"

[SpaceBeeGaming]

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Feature Description

As documented here https://discourse.cubecoders.com/t/forge-frequently-asked-questions/2982#p-6411-i-installed-a-modpack-using-amps-ftb-downloader-why-did-it-start-in-vanilla-or-the-update-manager-reported-a-successful-update-but-minecraftminecraft_serverjar-is-missing-4

Amp doesn't configure the server type correctly for FTB New Source modpacks.

This is due to the FTB download API not providing AMP proper version information when downloading modpacks.

However, what is stopping AMP from reading that information from the .manifest.json file downloaded during pack installation?

{
  "id": 125,
  "name": "FTB Evolution",
  "versionName": "1.20.0",
  "versionId": 100112,
  "modPackTargets": {
    "modLoader": {
      "name": "neoforge",
      "version": "21.1.187"
    },
    "javaVersion": "21.0.4+7-LTS",
    "mcVersion": "1.21.1"
  },
...

It's right there at the top.