feat: config files and SSE (#83)

Signed-off-by: mudler <mudler@mocaccino.org>
Signed-off-by: Tyler Gillson <tyler.gillson@gmail.com>
Co-authored-by: Tyler Gillson <tyler.gillson@gmail.com>

tests/fixtures/completion.tmpl

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+{{.Input}}

tests/fixtures/config.yaml

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+- name: list1
+  parameters:
+    model: testmodel
+  context_size: 512
+  threads: 10
+  stopwords:
+  - "HUMAN:"
+  - "### Response:"
+  roles:
+    user: "HUMAN:"
+    system: "GPT:"
+  template:
+    completion: completion
+    chat: ggml-gpt4all-j
+- name: list2
+  parameters:
+    model: testmodel
+  context_size: 512
+  threads: 10
+  stopwords:
+  - "HUMAN:"
+  - "### Response:"
+  roles:
+    user: "HUMAN:"
+    system: "GPT:"
+  template:
+    completion: completion
+    chat: ggml-gpt4all-j

tests/fixtures/ggml-gpt4all-j.tmpl

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+The prompt below is a question to answer, a task to complete, or a conversation to respond to; decide which and write an appropriate response.
+### Prompt:
+{{.Input}}
+### Response:

tests/fixtures/gpt4.yaml

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+name: gpt4all
+parameters:
+  model: testmodel
+context_size: 512
+threads: 10
+stopwords:
+- "HUMAN:"
+- "### Response:"
+roles:
+  user: "HUMAN:"
+  system: "GPT:"
+template:
+  completion: completion
+  chat: ggml-gpt4all-j

tests/fixtures/gpt4_2.yaml

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+name: gpt4all-2
+parameters:
+  model: testmodel
+context_size: 1024
+threads: 5
+stopwords:
+- "HUMAN:"
+- "### Response:"
+roles:
+  user: "HUMAN:"
+  system: "GPT:"
+template:
+  completion: completion
+  chat: ggml-gpt4all-j