Remove tag based include filters

[nvnieuwk]

This pull request removes tag-based include filters from the samplesheet logic, reflecting a shift to splitting samplesheets per tag. It also updates documentation to version 0.4.1 and adjusts the test snapshots to match the new logic. The most important changes are summarized below.

Samplesheet logic simplification:

• Removed all tag-based conditions (e.g., checks for data.tag) from include_func in nfcmgg_preprocessing.yml, since samplesheets are now split per tag and these checks are redundant. [1] [2] [3] [4]

Documentation updates:

• Updated the plugin version in README.md to 0.4.1 and added a changelog entry noting the removal of tag-based include filters. [1] [2]

Test updates:

• Updated test snapshots in main.nf.test.snap to reflect the new samplesheet logic, ensuring tests align with the removal of tag-based filters. [1] [2]