Add helper methods for array manipulation

Introduced new helper methods to simplify common array operations:

* Concatenation: Combine multiple arrays into a single array.
* Prepend: Add elements to the beginning of an array.
* Append: Add elements to the end of an array.

Test: TH
Change-Id: I6d9e19d7152c2ae3e75c3d521b4ee994347c4d2e
2 files changed