Style the buttons of TalentTreeTweaks and TalentLoadoutManager

[RedAces]

What does this PR do?

Adds the buttons of the Addons "TalentTreeTweaks" and "TalentLoadoutManager" to the styler.

How was it tested?

Tested with 12.1 retail.
Tested with Talent Loadout Manager 1.6.34
Tested with Talent Tree Tweaks 1.13.31

Screenshots

Checklist

• New settings default OFF (no behavior change without opt-in)
• Zero cost while disabled: no events registered, no polling, no hooks doing work, no frames built
• Cheap while enabled: event-driven (no polling, no timer-based logic, no per-frame allocations)
• No writes onto Blizzard-owned frames (weak-table pattern used); HookScript/hooksecurefunc only, never SetScript on Blizzard frames
• Tested in-game on live; no version gates or pre-Midnight APIs added

[RedAces]

The EllesmereUIBlizzardSkin/EllesmereUIBlizzardSkin_WindowPacks.lua is close to the limit of 200 variables.

Do you want me to refactor it to put more variables into tables in order to relax this a little bit?