Feature: Add `decimals` parameter to `power`

[ZCG-coder]

Is your feature request related to a problem? Please describe.
Currently, the power method takes roots to find out the power, if the exponent is a decimal.

Steppable/src/calc/power/power.cpp

Lines 67 to 79 in bd0b575

	if (isDecimal(raiseTo))
	{
	// Raising to decimal power.
	// Steps:
	// 1. Convert the decimal to a fraction.
	// 2. Raise the number to the numerator of the fraction.
	// 3. Take the root of the number to the denominator of the fraction.
	const auto& fraction = Fraction(raiseTo);
	const auto& [top, bottom] = fraction.asArray();
	const auto& powerResult = power(_number, top, 0);
	const auto rootResult = root(powerResult, bottom, 8);
	return reportPowerRoot(number, raiseTo, fraction, rootResult, steps);
	}

However, on line 77...

Steppable/src/calc/power/power.cpp

Line 77 in bd0b575

const auto rootResult = root(powerResult, bottom, 8);

The root function is being called without specifying the number of decimals, so the default 8 decimal places is used. This causes a huge loss in precision.

Describe the solution you'd like

• Add a parameter decimals to power.

Describe alternatives you've considered
None yet
Additional context
Add any other context or screenshots about the feature request here.