Update examples to mzQC v1.0

[bittremieux]

We need to make sure that the examples on the website are fully complaint with the official mzQC v1.0 specification.

Examples to update:

• [x] Single run @bittremieux
• [x] Multi-run @bittremieux #219
• [x] QC example @mwalzer #231
• [x] mzQC in mzML @bittremieux #228
• [x] USI for mzQC @cbielow #229
• [ ] Metabolomics batch correction @nilshoffmann #233

New examples to add:

• [ ] Interoperability between SDRF and mzQC

Procedure to ensure that the examples are valid:

• The full mzQC file successfully passes validation with our validator.
• The mzQC snippets in the corresponding markdown file are updated accordingly.
• The description in the markdown file is accurate and informative.

Nice to have:

• Pretty format the mzQC JSON content (indentation 2 spaces).
• Format the markdown page to have each sentence start on a new line (for convenient git diffs)

[mwalzer]

@mwalzer TLC for open (old) PRs

[mwalzer]

I made some updates to the pymzqc lib that might be helpful to this and future issues of the type:

• You can now easily call the local validator via mzqc-validator,
• You can fix missing descriptions to (otherwise valid) mzQC skeletons - this will also do prettyprint indentation see also @readthedocs Install via: pip install -U git+https://github.com/MS-Quality-hub/pymzqc.git#v1.0.0rc3