#1008: Working <|image|> injection

[bioshazard]

I had trouble getting the latest master to work, so I branched off b38c72c since that was the last published Docker image. I was able to get image payloads working without needing to include <|image|> in the text part. I seem to run out of CUDA memory if I try a second image, but this will work for my single-image payload needs for now. I suspect I am wasting memory by duplicating the content per message, so some pointers on optimal rust would be appreciated or feel free to tweak this as needed.

I know mllama expects the <|image|> token in there. If any backends DONT expect the token in there, you might need to move this into the mllama backend itself to take care of its own need for such a token. Either way, I will be using this branch on my fork for myself, but I hope you can find it useful for #1008 if you the use case and approach is compelling. Thanks!

[github-actions]

Code Metrics Report

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 Language            Files        Lines         Code     Comments       Blanks
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 Shell                   1           57           22           18           17
 Plain Text              3         3723            0         2413         1310
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 YAML                    2           21           19            2            0
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 Jupyter Notebooks       4            0            0            0            0
 |- Markdown             2           77           32           31           14
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 (Total)                            282          210           32           40
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 Markdown               43         3333            0         2526          807
 |- BASH                 6          103          100            0            3
 |- JSON                 1           12           12            0            0
 |- Python               7          121          109            0           12
 |- Rust                12          406          344            0           62
 |- TOML                 2           75           63            0           12
 (Total)                           4050          628         2526          896
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 Rust                  296        89600        80403         1861         7336
 |- Markdown           143         1593           25         1448          120
 (Total)                          91193        80428         3309         7456
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 Total                 445       100226        83475         6903         9848
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