[Feature] Right-to-left (RTL) script/language support

[LehtoJ29480-pki]

What problem does this feature solve?

I've researched docs but I didn't find any information related to Right-to-left (RTL) "mode" or similar. This is so that languages with RTL scripts (Arabic, Hebrew etc.) are shown correctly. Is there a way to display ECharts in RTL format? (Usually RTL mode looks kind of like the chart is flipped horizontally.)

I noticed that Arabic language support is added in 5.5.0 but if there is no RTL mode then isn't it essentially useless then at this point?

[helgasoft]

duplicate of #16419. RTL support, if any, needs to be documented.