Add minibwa components

[lazappi]

Description

Add components for minibwa, the successor to bwa-mem:

• minibwa_index: Create an index from a FASTA file
• minibwa_map: Align reads using an index

Checklist before requesting a review

• I have performed a self-review of my code

• Conforms to the Contributing guidelines

• Proposed changes are described in the CHANGELOG.md

• I have tested my code with viash ns test --parallel -q <name or namespace>

• Check the correct box. Does this PR contain:

  • Breaking changes
  • New functionality
  • Major changes
  • Minor changes
  • Documentation
  • Bug fixes

[mdgrv]

Both components look clean and behave well on real data.

Checked:

• viash ns test -q minibwa → all 4 build+test SUCCESS; ASCII build gate passes (matches CI).
• Configs follow the 0.9.x conventions (engines/runners/argument_groups, boolean_true flags, meta_cpus, pinned minibwa:0.4--hab16a5f_0 with software_versions.txt), and the arg groups map cleanly onto the minibwa index / minibwa map CLI.
• Real-run smoke test on a SEQC2 HCC1395 chr21 ~30x tumor pair (~6.27M reads): index built fine, and minibwa_map gave 99.03% mapped / 97.90% properly paired, vs bwa_mem 99.57% / 98.96% on the same reads; within ~1 pp on every flagstat metric and noticeably faster. SAM header is correct (@SQ/@RG/@pg all present).

Note:

• In minibwa_map/script.sh the index prefix is resolved via ls "${par_index%/}"/*.l2b, if a dir ever holds more than one .l2b it silently picks one.