Add ordered params support and fix url encoding for Uplynk signature validation

[rubenglobant]

Description

This PR addresses critical issues with Uplynk signature validation caused by parameter handling.

Changes

1. Ordered Parameters API: Added orderedPreplayParameters to UplynkSSAIConfiguration. This assumes the caller provides the correct order required by the signature, preventing Dictionary from shuffling them.
2. URL Encoding Fix: Updated UplynkSSAIConfiguration+Extensions.swift to apply robust percent encoding to all values. This prevents double-decoding issues on the server (e.g., preserving npa%3D1 as npa%253D1) and handles commas in cid correctly.
3. Ping Fix: pingParameters now returns an empty string when .noPing is configured, preventing injection of unsigned parameters.

Motivation

Without these fixes, valid signatures generated server-side or via KMM logic were failing validation due to reordering or double-decoding of special characters.

[MaartenRimaux]

This change aligns pingParameters with the android implementation

The orderedPreplayParameters is indeed necessary to maintain the order of the keys and values.

This looks good to me ✅

[therama]

@rubenglobant We maintain a changelog file at the root of the repository for public changes that are worth logging. Since adding orderedPreplayParameters to UplynkSSAIConfiguration is a public API change then we should have an entry in the changelog file notifying it. Please add an entry under the Unreleased tag. You don't need to worry about the date/versioning in the changelog file as that will be taken care of by the release process.

[rubenglobant]

Added the changelog entry

[therama]

@rubenglobant Since it's a repo containing multiple connectors, we specify the title of the connector before the change. In this case it should be Uplynk. Please check the format for other entries and apply the same title to your entry.

[therama]

@rubenglobant Also make sure to add Added or Fixed tags. Again see other entries.

[ceyhun-o]

Hi @rubenglobant,

This PR as is is incomplete without proper changelog entries and documentation updates, and therefore does not meet our standards to merge. Since we also do not have access to make changes to your fork, in order to speed up the process I am closing this PR in favor of #110, where I have cherry-picked your changes.

Once again, thank you for your contribution.