[core] Per-rule configuration in .krolik.json

[anatolykoptev]

Description

Allow enabling/disabling rules and changing severity per-project via configuration.

Example Config

{
  "rules": {
    "any-type": "off",
    "console-log": "warn",
    "complexity": { 
      "severity": "error", 
      "maxComplexity": 15 
    },
    "ts-ignore": {
      "severity": "error",
      "allowWithDescription": true
    }
  }
}

Config Resolution

1. Default rule config (built-in)
2. .krolik.json in project root
3. CLI flags (highest priority)

Tasks

• Define JSON schema for rules config
• Add rules section parsing in config loader
• Implement rule filtering by config
• Support severity override per rule
• Support rule-specific options
• Add config validation with helpful errors

Schema

interface RulesConfig {
  [ruleId: string]: 
    | 'off' | 'warn' | 'error'  // Simple
    | {                          // Detailed
        severity: 'off' | 'warn' | 'error';
        [option: string]: unknown;
      }
}

Acceptance Criteria

• Rules can be disabled with "rule": "off"
• Severity can be overridden
• Rule-specific options work
• Invalid config shows helpful error
• Documentation for all rule options