fix(checkstyle): move LineLength out of TreeWalker
fix(checkstyle): move LineLength out of TreeWalker

> Some Checks, such as FileLength and LineLength, apply directly to the source file and do not involve tokens of the syntax tree. Other Checks are associated with configurable sets of tokens that trigger the Checks. For example, this element configures Check MethodLength:

https://checkstyle.sourceforge.io/config.html#TreeWalker_Checks

avoids:
```
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-checkstyle-plugin:3.1.1:check (validate) on project fuzzy-octo-shame: Failed during checkstyle configuration: cannot initialize module TreeWalker - TreeWalker is not allowed as a parent of LineLength Please review 'Parent Module' section for this Check in web documentation if Check is standard. -> [Help 1]
```

Hornswaggler/fuzzy-octo-shame,FOShameDotOrg/fuzzy-octo-shame,FOShameDotOrg/fuzzy-octo-shame