Hello nextflow demo - do not merge

[georgiesamaha]

This pull request includes several changes to set up a Gitpod environment for the "hello-nextflow" workshop, including configuration files, Docker setup, and initial scripts. The most important changes include the addition of Gitpod configuration files, Dockerfile setup, and various Bash scripts for workflow automation.

Keep as unmerged branch to demo setup of training env in gitpod

Gitpod Configuration:

• .gitpod.code-workspace: Added configuration to open the correct directory in the explorer and set editor preferences.
• .gitpod.dockerfile: Added Dockerfile to set up the environment, install necessary utilities, and download Nextflow.
• .gitpod.yml: Configured Gitpod workspace settings, prebuilds, Docker image, tasks, and VSCode extensions.

Documentation:

• README.md: Updated README to provide instructions on how to use the Gitpod environment for the hello-nextflow workshop.

Bash Scripts:

• part2/bash_scripts/00_index.sh: Added script to create a results directory and index transcripts using Salmon.
• part2/bash_scripts/01_fastqc.sh: Added script to run FastQC on sample reads and store the logs.
• part2/bash_scripts/02_quant.sh: Added script to quantify transcript abundance using Salmon.
• part2/bash_scripts/03_multiqc.sh: Added script to aggregate results using MultiQC.

Data Files:

• part2/data/samplesheet.csv: Added sample sheet with paths to sample fastq files.
• part2/data/samplesheet_full.csv: Added extended sample sheet with additional samples.