`VerRule` validation rule

[Mr-Leshiy]

Summary

Extract validate_id_and_ver function into the VerRule as other validation rules like ContentTypeRule, ContentEncodingRule etc.

VerRule should cover only this scenario from the validate_id_and_ver

document `ver` cannot be smaller than document id field

Description

• Created VerRule validation rule type with the check method as other validation rules.

pub(crate) struct VerRule; 

• As an implementation of the VerRule::check must be the current validate_id_and_ver logic.
• Get rid of validate_id_and_ver function.
• Add VerRule into the Rules type as a field

struct Rules {
...
 ver: VerRule,
...
}