Simplify anonymization of an article

[csware]

Added a new documentclass option anonymous and new macro \anon fo simplifying anonymization. I saw this in the acmart and found this really useful.

The \thanks macro could be replaced with a placeholder... But this doesn't seem to be an issue ATM as thanks seems to be broken anyways.

[csware]

@sieversMartin I rebased this.

How to build lni.pdf?

[sieversMartin]

pdflatex lni.dtx

[koppor]

How to get PDFs?

I merged main into this. Now, the build PDF is available at the job output: https://github.com/gi-ev/LNI/actions/runs/5505788054?pr=100

Hint on local execution

Be careful when running pdflatex lni.dtx: It overwrites (!) the files you modified. (This is the way back then package authoring was intended).

What I am doing is to work on the generated files, stage them and then port the changed to lni.dtx, regenerate. If any diff is shown by git gui, I reiterate on adapting lni.dtx. Refs #108.

Sneak preview on your change

[csware]

@koppor Updated.

[koppor]

CHANGELOG.md entry added at 6035f20

[koppor]

Side note: No need to force-push. I am doing a squash-merge (creating one commit in the main branch) at the merge. - Having separate commits in the PR helps to review. In the concrete case, I spent five minutes searching for the & in the diff until I realized that there was a force push ^^.

[csware]

I prefer clean history.