Introduce a mechanism to sort feed groups

1. Environment

• Device: [Pixel 8 Pro]
• OS: [Android 14]
• APP: [0.9.11]

2. Describe the bug

In various contexts, across both Fever and GReader APIs, feed groups are often sorted strangely, without following any consistent logic.

For example: when a new group/category is created on the remote Fever server, Read You fetches the new group just fine, but always puts it at the end of the group list - no matter the alphabetical order.

For example, let's say I have the following groups:

Group 1
Group 2

Let's say I create Group 0 on the remote Fever server. After sync, I would expect the group listing to look like this:

Group 0
Group 1
Group 2

Instead, it looks like this at present:

Group 1
Group 2
Group 0

If we had manual group ordering, this would be less of a problem, but since that would be a bigger feature, it would be good to at least sort it alphabetically for now.

This also applies to the GReader API; it does not sort groups at all, and it's hard to control the order.

Trace how feed groups are fetched and presented after sync through the Fever and GReader API paths. Reproduce the ordering with newly created groups, then verify that both paths produce alphabetical group listings without changing the requested manual-ordering feature.