core/utils: engineering notation helpers
It would be great to have some auxiliary API to parse numbers written in the engineering notation (e.g. 945.6M, -33k) to the regular numbers (float?), and, vice versa, the regular numbers to engineering notation. This is useful in the cases where a user should provide some input, such as frequency (e.g. in osmo-arfcn) or sample rate.
If this feature also looks useful for others, I would implement it.