Release Zinc Heron · nf-core/proteinfamilies

#182 - Added an alternative, iterative family generation algorithm, selectable with --family_generation_algorithm iterative. It hands whole chunks of clusters (--clusters_per_chunk) to mgnifam, which repeats HMM building, sequence recruitment and realignment per cluster until each family converges or is discarded. Applies to both newly created and merged families. (by @vagkaratzas)

#182 - Fixed MERGE_FAMILIES:MERGE_SEEDS using the first sample's seed MSAs for every sample: pooled families are now paired with their own sample's seeds. (by @vagkaratzas)
#177
- Fixed OSError: [Errno 36] File name too long in MERGE_FAMILIES:MERGE_SEEDS when a pool combines many families: merged_id now collapses to a stable hash once the readable form would exceed the filesystem name-length limit. (by @vagkaratzas, bug reported by @Yixuan39)
- Fixed FAMSA_ALIGN aborting with exit status 134 on merged families: MERGE_SEEDS now drops all-gap records, which CLIPKIT can leave behind when a member's residues all fall in trimmed columns, and which FAMSA cannot realign. (by @vagkaratzas, bug reported by @Yixuan39)

#186 - Raw family HMMs are now published under a subfolder named after the tool that built them, hmm/raw/hmmer_hmmbuild/ or hmm/raw/mgnifam/, matching how the seed and full MSA outputs are already organised. (by @vagkaratzas, suggested by @nickp60)
#186 - Restricted samplesheet sample names to letters, digits, dots, underscores and dashes. Family names are parsed back out of file names with split("<sample>_"), which takes a regex, so a sample name carrying a regex metacharacter could mis-split; the sample name also builds output paths. (by @vagkaratzas, raised by @erikrikarddaniel)
#182 - Updated CHUNK_CLUSTERS and MERGE_SEEDS to optionally output TSV, required by the iterative family generation subworkflow. (by @vagkaratzas)
#179 - nf-core tools template update to 4.0.3. (by @vagkaratzas)

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