add marlin as cargo feature

[haricot]

This ensures broader accessibility to Mistral.rs across different hardware configurations by enabling its use even on systems with a CUDA compute capability less than 8.0.

[github-actions]

Code Metrics Report

  ===============================================================================
 Language            Files        Lines         Code     Comments       Blanks
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 C Header                2           35           28            0            7
 Dockerfile              1           34           25            0            9
 Happy                   1          442          369            0           73
 JSON                   12          105          104            0            1
 Python                 52         2280         1940           68          272
 TOML                   20          630          564            2           64
 YAML                    2           21           19            2            0
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 Jupyter Notebooks       4            0            0            0            0
 |- Markdown             2           77           32           31           14
 |- Python               2          196          169            1           26
 (Total)                            273          201           32           40
-------------------------------------------------------------------------------
 Markdown               38         2803            0         2132          671
 |- BASH                 6          103          100            0            3
 |- JSON                 1           12           12            0            0
 |- Python               5           92           82            0           10
 |- Rust                 9          322          274            0           48
 |- TOML                 2           75           63            0           12
 (Total)                           3407          531         2132          744
-------------------------------------------------------------------------------
 Rust                  269        79455        71330         1688         6437
 |- Markdown           131         1357           25         1237           95
 (Total)                          80812        71355         2925         6532
===============================================================================
 Total                 402        85805        74379         3892         7534
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