Add welcome bot

[RayStick]

Closes #

Proposed Changes

• A bit more context in the README
• Added welcome bot (this has already been implanted in other repos, see here for explanation and see here for implementation in phys2bids - it is the exact same config.yml file being added

Change Type

• bugfix (+0.0.1)
• minor (+0.1.0)
• major (+1.0.0)
• refactoring (no version update)
• test (no version update)
• infrastructure (no version update)
• documentation (no version update)
• other

Checklist before review

• I added everything I wanted to add to this PR.
• [Code or tests only] I wrote/updated the necessary docstrings.
• [Code or tests only] I ran and passed tests locally.
• [Documentation only] I built the docs locally.
• My contribution is harmonious with the rest of the code: I'm not introducing repetitions.
• My code respects the adopted style, especially linting conventions.
• The title of this PR is explanatory on its own, enough to be understood as part of a changelog.
• I added or indicated the right labels.

• I added information regarding the timeline of completion for this PR.

• Please, comment on my PR while it's a draft and give me feedback on the development!

[me-pic]

Should we add the hyperlink to the Physiopy website home page ?
https://physiopy.github.io/

[RayStick]

See add link

[me-pic]

Since the guideline also has a section on data processing, maybe we can add :
This repository contains the source files for our community guidelines on collecting and processing physiological data.
If I'm remembering correctly, we also talked at some point that it would be relevant to add a section on Data QCing. So I'm wondering if that specification is necessary, or if it's better to simply modify the README every time a new section is added 🤷

[RayStick]

Hmm I see what you mean. Shall we keep it general (i.e. unchanged) then?
I think "collecting and processing physiological data" covers a lot though =D so maybe this is good

[me-pic]

Agree ! Let's keep it general.