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Co-Authored-By: Jeffrey Morgan <jmorganca@gmail.com>

- default to embeddings enabled
- move embedding logic for loaded model to request
- allow embedding full directory
- close llm on reload

Fixes #297
Fixes #296

num_keep defines how many tokens to keep in the context when truncating
inputs. if left to its default value of -1, the server will calculate
num_keep to be the left of the system instructions

- read runner options from map to see what was specified explicitly and overwrite zero values

* basic distribution w/ push/pull

* add the parser

* add create, pull, and push

* changes to the parser, FROM line, and fix commands

* mkdirp new manifest directories

* make `blobs` directory if it does not exist

* fix go warnings

* add progressbar for model pulls

* move model struct

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Co-authored-by: Jeffrey Morgan <jmorganca@gmail.com>

feed responses back into the llm