Add linter for editorconfig

[anbraten]

We actually have a linter / tests for the editorconfig already or do you mean adding it to the linter which checks a config before the pipeline executes it?

[6543]

well i found a wrong intendation:

https://github.com/woodpecker-ci/woodpecker/blob/fe006d9656309cab84c6059f7648ba2c6ee1ca30/.woodpecker/docs.yml#L56-L57

[6543]

  editor-config:
    image: mstruebing/editorconfig-checker

adding this step should do it

[6543]

to exclude stuff create file .ecrc

{
  "Exclude": ["LICENSE", ".git*"]
}