Publish this plugin in the Nextflow plugin registry

[clintval]

Pre-requisites I see:

• Open-source this repository
• Must have a release on GitHub (ideally a 1.0.0)
• Have some real-world confidence this library is stable and does what it says it does
• Make a PR here: https://github.com/nextflow-io/plugins/blob/main/plugins.json

[clintval]

I confirm the plugin registry commit is functional with the example in the README and the following commands:

❯ ls ~/.nextflow/plugins
<empty>

❯ export NXF_PLUGINS_TEST_REPOSITORY="https://raw.githubusercontent.com/clintval/plugins/a5b6bcd9b6990a6b67b2cb92910fddb0d2e7d0a4/plugins.json" 
❯ nextflow run main.nf
N E X T F L O W  ~  version 23.10.0
WARN: =======================================================================
=                                WARNING                                    =
= You are running this script using a un-official plugin repository.        =
=                                                                           =
= https://raw.githubusercontent.com/clintval/plugins/a5b6bcd9b6990a6b67b2cb92910fddb0d2e7d0a4/plugins.json
=                                                                           =
= This is only meant to be used for plugin testing purposes.                =
=============================================================================

Launching `main.nf` [sick_sanger] DSL2 - revision: 2d7d2df538
executor >  local (1)
[c0/eddb5b] process > emit_samtools_version [100%] 1 of 1 ✔
samtools 1.17

❯ ls ~/.nextflow/plugins
nf-dotenv-1.0.0

[clintval]

Registry PR: nextflow-io/plugins#55

[clintval]

Done!