Address trivial review changes from PR #52

[vinisalazar]

Summary

Addresses the review comments from #52 (jfy133 and jonasscheid).

• Fix ext.prefix ternary syntax in conf/modules.config — must be inside a single closure
• modules/local/fmhfunprofiler/main.nf: fix fmhfuncprofiler typo → fmhfunprofiler, remove TODO comments, fix version string (was full container URL, now just version tag)
• modules/local/fmhfunprofiler/tests/main.nf.test: remove TODO comments
• modules/local/fmhfunprofiler/meta.yml: rewrite from stale BAM-centric template to correct inputs/outputs for fmhfunprofiler
• docs/output.md: restore Nextflow boilerplate, convert warning heading to :::note admonition, remove --- separators, add FastQC output docs, add tool descriptions before each section, remove <details> dropdowns
• docs/usage.md: convert all GitHub-flavoured admonitions ([!NOTE], [!WARNING], [!IMPORTANT], [!TIP]) to nf-core website admonitions (:::note, :::warning, :::tip); capitalise Mifaser heading

Not addressed (non-trivial)

• Moving local humann/rgi/mifaser/diamond modules to nf-core/modules
• Bioconda packaging for fmhfunprofiler
• test_full.config with real data
• Container policy (ghcr → quay)
• nextflow_schema.json parameter default inconsistencies

[nf-core-bot]

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