Update CI

[devmotion]

I noticed that there are no Github releases for the latest releases of CodeInfoTools since there is no TagBot action.

This PR:

• adds TagBot such that (a) new releases show up on Github and (b) documentation is built for new releases
• removes CompatHelper since the package has no dependencies and the action is disabled due to inactivity anyways
• simplifies the other Github actions and adds tests with the stable Julia version (currently 1.7)
• adds a config file for JuliaFormatter which is picked up by e.g. VSCode

[codecov]

Codecov Report

Merging #15 (06eec83) into master (510d0e4) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #15   +/-   ##
=======================================
  Coverage   99.27%   99.27%           
=======================================
  Files           1        1           
  Lines         275      275           
=======================================
  Hits          273      273           
  Misses          2        2           

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 510d0e4...06eec83. Read the comment docs.