fix: trim any quotes wrapping PATH when elixir is managed by mise

[rktjmp]

When Expert.Port detects the elixir executable, it extracts the current env from mise/rtx if present, by calling mise env -s bash. This returns

...
export PATH='<path>'
...

If we don't strip the surrounding single quotes, later when we re-inject PATH into the environmetn, sh will fail to intepret it correctly, meaning future calls to any mise managed executables such as erl will fail as a command not found. This will then cause servers to fail to load and bubble an {:erpc, :noconnection} error up to the user.

#59 (comment)

[rktjmp]

One user in the linked thread said they had issues with asdf, but I think its because they were running elixir 1.14, which I don't think the nightly build is generated to support (looking at the CI workflow). This is why I did not apply the patch to the asdf branch. I could not find any examples or mention outside of lexical that referenced PATH_SAVE + asdf, so I'm not sure if that would also need adjusting.

You can see the described failure case by doing something like this:

# in /bin/sh, which is what elixir's shell launcher scripts run under, not bash!
# and assuming you have something to run not in a default path such as /usr/bin etc
# eg: you have ~/.local/bin/expert
$ expert
<ctrl-c> # it works
$ PATH="'$PATH'"
$ expert
sh: expert: command not found

[doorgan]

I could not find any examples or mention outside of lexical that referenced PATH_SAVE + asdf

That's a leftover from the previous packaging method, we should remove the PATH_SAVE workaround

One user in the linked thread said they had issues with asdf, but I think its because they were running elixir 1.14

There is one specific project of mine that is giving a similar error to the one described in the comment(it is not finding erl) so I think this may be affecting asdf as well

[rktjmp]

I did test asdf 0.18, elixir 1.17, erlang 27, expert nightly in a container but it just worked for me.

You could try the same logging I did in that comment, see what $PATH is inside the elixir script.

[doorgan]

Yeah, there is something else that is preventing my asdf from finding erl that is unrelated to the bug you found, so let's merge this one