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- add the optional `raw` generate request parameter to bypass prompt formatting and response context
-add raw request to docs

Signed-off-by: Matt Williams <m@technovangelist.com>

Signed-off-by: Matt Williams <m@technovangelist.com>

* allow for a configurable ollama models directory

- set OLLAMA_MODELS in the environment that ollama is running in to change where model files are stored
- update docs
Co-Authored-By: Jeffrey Morgan <jmorganca@gmail.com>
Co-Authored-By: Jay Nakrani <dhananjaynakrani@gmail.com>
Co-Authored-By: Akhil Acharya <akhilcacharya@gmail.com>
Co-Authored-By: Sasha Devol <sasha.devol@protonmail.com>

Co-authored-by: Bruce MacDonald <brucewmacdonald@gmail.com>

Separate GGUF and PyTorch guides

Signed-off-by: Matt Williams <m@technovangelist.com>

Signed-off-by: Matt Williams <m@technovangelist.com>

Signed-off-by: Matt Williams <m@technovangelist.com>

* update streaming request accept header
* add optional stream param to request bodies

Avoid triple ticks in visual editor and also copied in clipboard.

Document response stream chunk delimiter.