Decompose an angle into various metrics.

Input parameters:

1. φ → Angle to decompose.

Output parameters:

1. Rd → Angle expressed in Radians.
2. Dg → Angle expressed in Degrees.
3. Tu → Angle expressed in full Turns.
4. Sp → Angle expressed as a rational Spread.
5. Gr → Angle expressed as a Grade percentage.