fix: remote create new file

[BruceMacD]

Just noticed this while working on the ollama-js library, two bugs.

• A new-line in the Modelfile causes path.exists() to not be true.
• The blob creation endpoint is POST rather than PUT

Example Modelfile:

FROM ~/models/nous-capybara/nous-capybara-34b.Q4_0.gguf
TEMPLATE "USER: { .Prompt } ASSISTANT: "