Creating a new fragment entirely via CLI args fails if there are custom prompts for the kind selected

**Description**
Title basically

**Reproduction Steps**
1. Create a changie config with a kind config that has custom prompts
1. Create a new fragment via the CLI including `-k` and `--custom` for the extra prompt
1. See error

**What happened**
Got an error

**Expected behavior**
A new fragment

**Additional context**
Happened at work, womp womp
