Rules updated to default to 'warn'

[taysea]

What does this PR do?

Updates recommended config to default rules to "warn" -- we rules should be inline help/educational but not prohibit people from commiting code.

Where should the reviewer start?

Can you provide a link to an AST Explorer example that validates the rule works as expected?

Any background context you want to provide?

What are the relevant issues?

Screenshots (if appropriate)

Have docs been added/updated?

Should this PR be mentioned in the release notes?

Is this change backwards compatible or is it a breaking change?

[halocline]

Question: Do each of the rule.meta.types need to be changed to 'suggestion' instead of problem?

[taysea]

Question: Do each of the rule.meta.types need to be changed to 'suggestion' instead of problem?

Good question, I will have a look at that an adjust as necessary.