feat(cdm): accept 'all' in Ticks at Stacks

[uNBEx]

What does this PR do?

Cooldown Manager -> Tracking Bars -> "Ticks at Stacks" now accepts the keyword
all in addition to a comma-separated list. Typing all puts a tick at every
stack, so a bar with Max Stacks 10 no longer needs 1,2,3,4,5,6,7,8,9 typed out
by hand and retyped every time the Max Stacks slider moves.

How was it tested?

Retail live, 12.1. Enabled Max Stacks on a stack-tracking bar, entered all,
confirmed evenly spaced ticks in both the options preview and on the live bar,
and confirmed the tick count follows the Max Stacks slider without retyping.

Screenshots

Checklist

• New settings default OFF (no behavior change without opt-in) - no new
  setting; the existing field defaults to "" and only behaves differently
  once a user types the keyword
• Zero cost while disabled: no events registered, no polling, no hooks doing
  work, no frames built - the expansion runs only when the token is present
• Cheap while enabled: event-driven (no polling, no timer-based logic, no
  per-frame allocations) - ApplyTBBTickMarks runs from the skin/apply pass
  and the _ticksDirty one-shot consumers, never OnUpdate; the loop is
  bounded by the Max Stacks slider cap of 100, and tick textures come from
  the existing per-bar cache
• No writes onto Blizzard-owned frames (weak-table pattern used);
  HookScript/hooksecurefunc only, never SetScript on Blizzard frames -
  N/A, pure Lua string/number handling on addon-owned frames; no game API touched
• Tested in-game, works on live retail; no load errors on the 12.1 PTR client