Support multi-line text in @field and @param comments

[nlebedenco]

This is a feature request to support multi-line text in @field and @param comments. For example:

--- @param myparam string A very long description
---                       that requires multiple lines

This is in line with a similar feature request in EmmyLua (https://github.com/EmmyLua/IntelliJ-EmmyLua/issues/363)