ci: add codespell

[roobre]

Description

This PR adds the (in my opinion) neat codespell action that checks for and suggest fixes for common spelling mistakes. It also fixes a few of those that codespell already found.

Checklist:

• My code follows the coding style of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works.
• Any dependent changes have been merged and published in downstream modules
  

[pablochacin]

@roobre I like the idea of automating the spelling checking as we (mostly me) have not been doing a great job there, as you have realized.

However, I'm more in the line of activating the misspelled linter than adding a new action because we already have the linter action, and second, it makes it easier to check and fix locally using the make lint target in the project's makefile.

[roobre]

@pablochacin I'm fine with a different tool, I went with this on a first try because it's the one I'm familiar with.

I'll give the one you suggest a try and go for that unless there is any big drawback w.r.t. codespell. Being able to run it locally is alsoa big plus for me.

[roobre]

@pablochacin I'm giving this a swing but I don't think it's working particularly well. Turns out the misspell linter is, in fact, already enabled as per:

xk6-disruptor/.golangci.yml

Line 72 in 82966c3

enable-all: true

But it does not seem to be extremely good at doing what it's supposed to do. It does work though, if you input a word from https://github.com/golangci/misspell/blob/master/words.go it will flag it, but coverage does not seem as good as codespell.

I've messed around a bit with the codespell action and it seems possible, while not very elegant, to run it locally with something like:

docker run -v `realpath .`:/disruptor -w /disruptor --entrypoint codespell ghcr.io/codespell-project/actions-codespell/stable:v2 --config .codespellrc

So perhaps a good option here wold be to add this command to a make target or similar.

[pablochacin]

LGTM