[Feature]: Alarm Card - Add additional color style options for arming and pending

[djagerif]

Requirements

• I have updated Mushroom to the latest available version
• I did a search to see if there is a similar issue or if a pull request is open.

Is your feature request related to a problem?

No operational problem.

Describe the solution you'd like

I would be nice to change the icon colors for 'pending' and 'arming' in the same way as the three currently implemented options below.

--mush-rgb-state-alarm-disarmed: var(--rgb-green);
--mush-rgb-state-alarm-armed: var(--rgb-red);
--mush-rgb-state-alarm-triggered: var(--rgb-yellow);

I would like to suggest the names below.

--mush-rgb-state-alarm-arming: var(--rgb-orange);
--mush-rgb-state-alarm-pending: var(--rgb-yellow);

Describe alternatives you've considered

Looking at the code I can use the following undocumented (well, I haven't seen it anywhere) variable but that will probably change all grey colors to EG. orange. For now it seems to work for the time being.

--mush-rgb-grey: var(--rgb-orange);

Using the native Lovelace card has the ability to change the color of all five states.

Additional context

No response