get list of countries from JS file

[Ephigenia]

A list of all supported countries and languages can be obtained from https://www.ikea.com/global/en/shared-data/regions.js

Right now it seems like there are 63 countries (+ "INTSALES")

AE
AT
AU
BE
BG
BH
CA
CE
CH
CL
CN
CY
CZ
DE
DK
DO
EE
EG
ES
FI
FR
GB
GR
HK
HR
HU
ID
IE
IL
IN
INTSALES
IS
IT
JO
JP
KR
KW
LT
LV
MA
MX
MY
NL
NO
OM
PH
PL
PR
PT
QA
RO
RS
RU
SA
SE
SG
SI
SK
SP
TH
TR
TW
UA
US