Add code quality flow recomendations to DDD skils and developer agent

[LeoVS09]

Add rules how to follow immutable and top of control principles, for example:

Bad code

const result = {}
if(featureEnabled)
  applyNewFeature(result)

Bad code

let result = {}
if(featureEnabled)
  result = applyNewFeature(result)

Good code

const result = featureEnabled ? applyNewFeature(result) : {}

---

Bad code

const result = performProcess(param)
logResult(result)

Good code

const result = performProcess(param)
logger.log('Result of execution', formatResult(result))

---

Bad code

const result = performProcess(param)
validateResult(result) // -> throws Error(...)

Good Code

const result = performProcess(param)
if(!isValid(result))
  throw SomeError(result)