Samtools - Prepare Fai Index
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Index fasta file to quicker retrieve substring sequences

**Location**

- *Filepath:* <SnakeLines_dir>/rules/shared/reference/index/fai/samtools.snake
- *Rule name:* samtools__prepare_fai_index

**Input(s):**

- *reference:* Genomic sequence file in fasta format to index

**Output(s):**

- *dict:* Index for the input reference genomic file