South Asian Languages characters are incorrect in spacing

[SmartManoj]

The issue is that we rely on the "East Asian With" spec by Unicode, like pretty much all terminals: https://www.unicode.org/reports/tr11/
As the name suggests, for southeastern languages it just says, "no designated width", which we by convention have to assume is 1 column wide. If you can find >1 terminal that solve this issue (= which we could use as reference), please let us know by opening a new issue for it. 🙂

Originally posted by @lhecker in #9490

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WT Version: 1.21.3231.0;
Microsoft Windows [Version 10.0.22631.4541]

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Readable in Cmder