update library modelfiles with new syntax

library/modelfiles/nous-hermes

 FROM ../models/nous-hermes-13b.ggmlv3.q4_0.bin
-PROMPT """
+TEMPLATE """
 ### Instruction:
 {{ .Prompt }}
 

library/modelfiles/orca

 FROM ../models/orca-mini-3b.ggmlv3.q4_0.bin
-PROMPT """
-{{- if not .Context }}
+TEMPLATE """
+{{- if .First }}
 ### System:
-You are an AI assistant that follows instruction extremely well. Help as much as you can.
+{{ .System }}
 {{- end }}
 
 ### User:
@@ -10,3 +10,5 @@ You are an AI assistant that follows instruction extremely well. Help as much as
 
 ### Response:
 """
+
+SYSTEM """You are an AI assistant that follows instruction extremely well. Help as much as you can."""

library/modelfiles/vicuna

 FROM ../models/vicuna-7b-v1.3.ggmlv3.q4_0.bin
-PROMPT """
-{{ if not .Context }}
-A chat between a curious user and an artificial intelligence assistant. The assistant gives helpful, detailed, and polite answers to the user's questions.
+TEMPLATE """
+{{ if .First }}
+{{ .System }}
 {{- end }}
 
 USER: {{ .Prompt }}
 ASSISTANT:
 """
+
+SYSTEM """A chat between a curious user and an artificial intelligence assistant. The assistant gives helpful, detailed, and polite answers to the user's questions."""

library/modelfiles/wizard-vicuna

 FROM ../models/Wizard-Vicuna-13B-Uncensored.ggmlv3.q4_0.bin
-PROMPT """
+TEMPLATE """
 USER: {{ .Prompt }}
 ASSISTANT:
 """