#2145: add tip on ide ln to Symlinks documentation

[MeShehi]

This PR fixes #2145

Implemented changes:

1. Added information on ide ln in Symlinks Documentation

Testing instructions

No need for testing, docs change

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[Paras14]

Hey @MeShehi, thanks for the contribution. A few points on the changes:

1. The new text doesn't render the way you'd expect. In AsciiDoc, lines without a blank line between them get joined into one paragraph, so right now your three lines collapse into a single run-on sentence and the command doesn't stand out at all. You can see it for yourself by opening the rendered .adoc on your branch (not the diff, the file view). Better to separate them with blank lines and put the command in a listing block.
2. "using the ln command" should be "the ide ln command", in my opinion for better understanding.
3. And finally, the last sentence is missing a period at the end.