After #5099#5491 we need more links to xonshrc article in our docs. So
I've added them.
## For community
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comment**
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Co-authored-by: a <1@1.1>
* feat: add function to make event registration from function signature
* docs: add xontrib special functions description
* feat: handle xontribs with special functions
also reduce usage of XSH singleton
* fix: missing XSH
for now import singleton
* docs: fix .rst format
* fix: failing tests
* feat: implement primitive xontrib-unload and xontrib-reload
* chore: give explicit name
* docs: update doc