In history (from some legacy frameworks), both `:name` and `name` are
supported as path path name, `:name` is an alias to `name`.
To make code consistent, now we should only use `name` but not `:name`.
Also added panic check in related functions to make sure the name won't
be abused in case some downstreams still use them.
This PR removes (almost) all path tricks, and introduces "renderhelper"
package.
Now we can clearly see the rendering behaviors for comment/file/wiki,
more details are in "renderhelper" tests.
Fix#31411 , fix#18592, fix#25632 and maybe more problems. (ps: fix
#32608 by the way)
