Add newer JS syntax to topic outline

[daaimah123]

Page where problem found?

https://github.com/Techtonica/curriculum/blob/main/javascript/newer-JS-features.md

Type of problem

The lesson is missing some newer features since the last update.

Suggested Solution

Add examples and explanations for things such as:

• Temporal
  • Modern date and time handling
  • Provides classes like PlainDate, PlainTime, ZonedDateTime
• Pipe Operator
  • Allows chaining functions in a more readable way
• Records and Tuples
  • Immutable data structures similar to objects and arrays
• RegExp /v flag
  • Improves Unicode support in regular expressions
• Decorators
  • Allow modifying or augmenting class, method, property, or parameter behavior
• Symbols as WeakMap keys
  • Allows using Symbols as keys in WeakMaps
  • Provides unique identifiers for WeakMap keys
• findLastIndex() method
  • Similar to findIndex(), but returns the index of the last element that satisfies the provided testing function
• String.prototype.replaceAll()
  • Replaces all occurrences of a substring in a string
• Object.fromEntries() static method
  • Converts an iterable of key-value pairs into an object
• Promise.allSettled() method
  • Waits for all promises in an array to either resolve or reject

Acceptance Criteria

• Ensure all new features are explained clearly and concisely
• Include relevant code examples for each new feature
• Maintain consistency with the existing lesson structure and style
• Update any related exercises or quizzes if necessary
• Review and update the prerequisites if needed
• Examples of what to include:
  • Include Temporal API features:
    • Explain PlainDate, PlainTime, and ZonedDateTime classes
    • Provide examples of their usage
  • Add Pipe Operator section:
    • Explain how it allows chaining functions in a more readable way
    • Provide examples of its usage
  • Introduce Records and Tuples:
    • Explain immutable data structures similar to objects and arrays
    • Provide examples of their usage
  • Update RegExp section:
    • Mention the /v flag for improved Unicode support in regular expressions
    • Provide examples of its usage
  • Add Decorators section:
    • Explain how decorators modify or augment class, method, property, or parameter behavior
    • Provide examples of their usage
  • Include Symbols as WeakMap keys:
    • Explain how Symbols can be used as unique identifiers for WeakMap keys
    • Provide examples of their usage
  • Add findLastIndex() method section:
    • Explain that it's similar to findIndex(), but returns the index of the last element
    • Provide examples of its usage
  • Include String.prototype.replaceAll() section:
    • Explain how it replaces all occurrences of a substring in a string
    • Provide examples of its usage
  • Add Object.fromEntries() static method section:
    • Explain how it converts an iterable of key-value pairs into an object
    • Provide examples of its usage
  • Update Promise.allSettled() method section:
    • Explain how it waits for all promises in an array to either resolve or reject
    • Provide examples of its usage

[jsnorek]

I'll start on this issue

[daaimah123]

@jsnorek I have assigned you to the issue and added the acceptance criteria

[jsnorek]

Created a new branch to start on this issue

[jsnorek]

Started a PR request #2167 and linking reviewers