add cutadapt module

tools/cutadapt/main.nf

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+process cutadapt {
+    tag "${sample_id}"
+
+    container 'quay.io/biocontainers/cutadapt:1.16--py27_1'
+
+    input:
+    tuple sample_id, file(input_forward_fq), file(input_reverse_fq)
+
+    output:
+    tuple sample_id, file(output_forward_fq), file(output_reverse_fq)
+
+    script:
+    """
+    cutadapt \
+			-j ${task.cpus} \
+			-q $params.cutadapt_min_quality \
+			--minimum-length $params.cutadapt_min_length \
+			--pair-filter=any \
+			--output ${forward_fq} \
+			--paired-output ${reverse_fq} '$input_forward_fq' '$input_reverse_fq'
+    
+    cutadapt --version &> v_cutadapt.txt
+    """
+}

tools/cutadapt/meta.yml

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+name: Cutadapt
+description: cutadapt removes adapter sequences from high-throughput sequencing reads
+keywords:
+  - Quality Control
+  - QC
+  - Adapters
+tools:
+  - fastqc:
+      description: |
+        Cutadapt finds and removes adapter sequences, primers, poly-A tails and other types of unwanted sequence
+        from your high-throughput sequencing reads.
+
+        Cleaning your data in this way is often required: Reads from small-RNA sequencing contain the 3’
+        sequencing adapter because the read is longer than the molecule that is sequenced. Amplicon reads 
+        start with a primer sequence. Poly-A tails are useful for pulling out RNA from your sample, but 
+        often you don’t want them to be in your reads.
+      homepage: https://cutadapt.readthedocs.io/en/stable/
+      documentation: https://cutadapt.readthedocs.io/en/stable/
+input:
+  - - sample_id:
+        type: string
+        description: Sample identifier
+    - input_forward_fq:
+        type: file
+        description: Input FastQ forward read file of the pair
+    - input_reverse_fq:
+        type: file
+        description: Input FastQ reverse read file of the pair
+output:
+  - - sample_id:
+        type: string
+        description: Sample identifier
+    - output_forward_fq:
+        type: file
+        description: Output FastQ forward read file of the pair
+    - output_reverse_fq:
+        type: file
+        description: Output FastQ reverse read file of the pair
+authors:
+  - @piotr-faba-ardigen