feat(utils): Introduce safe append util

[wock9000]

Go's native append reuses old slice allocation if it's capacity is sufficient.

For example:

import "fmt"

func main() {
    a := []byte("🐻")
    a = append(a, 'x')
    b := append(a, 'y')
    c := append(a, 'z')
    fmt.Println(string(a))
    fmt.Println(string(b))
    fmt.Println(string(c))
}

Output:

🐻p
🐻pr
🐻pr

Output should be 🐻xy

Summary by CodeRabbit

• New Features
  • Introduced new methods for appending elements to lists with options for both in-place and non-modifying operations.

[coderabbitai]

Walkthrough

The recent update introduces two new functions for handling slices in Go: InPlaceAppend for modifying an existing slice and ImmutableAppend for creating a new slice with added elements. Accompanying tests validate the functionality, ensuring that the in-place version doesn't create additional copies and the immutable version maintains the original slice unaltered.

Changes

Files	Change Summary
utils/append.go	Added InPlaceAppend and ImmutableAppend functions.
utils/append_test.go	Added tests for InPlaceAppend and ImmutableAppend functions.

Poem

🐇💻🌟

In the land of code, where the data hops around,
A rabbit devised a way, for slices to abound.
'In-place' or 'new', append with care,
Run the tests, ensure all's fair.
🌱🥕📈

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Review Status

Actionable comments generated: 0

Configuration used: CodeRabbit UI

Commits

Files that changed from the base of the PR and between 0bf7199 and 9eb7463.

Files selected for processing (2)

• utils/append.go (1 hunks)
• utils/append_test.go (1 hunks)

Additional comments: 4

utils/append.go (2)

• 28-31: The InPlaceAppend function correctly uses the append function to modify the slice in place.
• 33-38: The ImmutableAppend function correctly creates a new slice to ensure immutability of the original slice.

utils/append_test.go (2)

• 46-81: The tests for InPlaceAppend function correctly check the behavior of the function with different data types and ensure that the slice is modified in place as expected.
• 84-162: The tests for ImmutableAppend function correctly verify the immutability of the original slice and the correctness of the returned slice after appending elements.