Add UCUM ascii mappings to UnitsDB units

[ronaldtse]

From https://ucum.org/ucum.html

Requires manual import of the ASCII units (c/s [case sensitive] and c/i [case insensitive])

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e.g.

Table 4

name	kind of quantity	print	c/s	c/i	M	definition value	definition unit
mole	amount of substance	mol	mol	MOL	yes	6.0221367	10*23
steradian	solid angle	sr	sr	SR	yes	1	rad2
hertz	frequency	Hz	Hz	HZ	yes	1	s-1
newton	force	N	N	N	yes	1	kg.m/s2
pascal	pressure	Pa	Pa	PAL	yes	1	N/m2
joule	energy	J	J	J	yes	1	N.m
watt	power	W	W	W	yes	1	J/s
ampère	electric current	A	A	A	yes	1	C/s
volt	electric potential	V	V	V	yes	1	J/C
farad	electric capacitance	F	F	F	yes	1	C/V
ohm	electric resistance	Ω	Ohm	OHM	yes	1	V/A
siemens	electric conductance	S	S	SIE	yes	1	Ohm-1
weber	magnetic flux	Wb	Wb	WB	yes	1	V.s
degree Celsius	temperature	°C	Cel	CEL	yes	•	cel(1 K)
tesla	magnetic flux density	T	T	T	yes	1	Wb/m2
henry	inductance	H	H	H	yes	1	Wb/A
lumen	luminous flux	lm	lm	LM	yes	1	cd.sr
lux	illuminance	lx	lx	LX	yes	1	lm/m2
becquerel	radioactivity	Bq	Bq	BQ	yes	1	s-1
gray	energy dose	Gy	Gy	GY	yes	1	J/kg
sievert	dose equivalent	Sv	Sv	SV	yes	1	J/kg

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For @w00lf.

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The full file is at:

• https://github.com/ucum-org/ucum/blob/main/ucum-essence.xml