feat: add cache to defineGetter

[nigrosimone]

Adding this cache to the defineGetter function has several implications:

• Performance Improvement: The getter function will only be called once, and its result will be stored. Subsequent accesses to the property will return the cached value, avoiding the cost of repeatedly executing the getter function.
• Consistency: The value returned by the getter will remain consistent for the lifetime of the property on the object. If the getter logic involves any computation that could potentially change, this cache will prevent any changes from being reflected in the property's value after the first access.
• Side Effects: If the getter function has side effects (e.g., logging, triggering other operations), these will only occur once when the value is first computed. Subsequent accesses will not trigger these side effects.

Just for POC, I have enabled only on query

[IamLizu]

Referencing expressjs/discussions#306

[krzysdz]

Consistency: The value returned by the getter will remain consistent for the lifetime of the property on the object. If the getter logic involves any computation that could potentially change, this cache will prevent any changes from being reflected in the property's value after the first access.

Well, I think one of the reasons why some properties are getters is that they reflect changes to the source object (e.g. req.url).

• the changes you make to req.url are instantly reflected in req.query

  request.query behaves immutable in 5.x  #2752 (comment)

• you can always directly change req.url in order to affect req.query

  [v5] req.query is not writable anymore #4433 (comment)

• The commit itself is desired for three reasons: (1) the query parameters are no longer parsed until something actually needs them and (2) the "query parser" can be altered at any point and be reflected in the app and finally (3) it now always reflects changes made to req.url.

  Setting req.query #3472 (comment)

Caching getters would be a breaking change and definitely cannot land in 5.x.