feat(esupports.hop): support os_open_link for WSL

[ShangjinTang]

Environment

Use Neovim with this plugin in Windows Subsystem for Linux (WSL)

Steps

1. Create a hyperlink in .norg file , e.g. "{https://github.com}[GitHub]"
2. Move cursor to the hyperlink
3. Press Key [Enter]

Current phenomenon (without this PR)

An error occured:

stack traceback:
	[C]: in function 'error'
	...nvim/site/pack/lazy/opt/plenary.nvim/lua/plenary/job.lua:106: in function 'new'
	...pt/neorg/lua/neorg/modules/core/esupports/hop/module.lua:94: in function 'os_open_link'
	...pt/neorg/lua/neorg/modules/core/esupports/hop/module.lua:122: in function <...pt/neorg/lua/neorg/modules/core/esupports/hop/module.lua:121>

With this PR

Link can be opened with Windows default browser successfully.

[ShangjinTang]

There are multiple ways to solve this:

1. my current PR
2. similar to my current PR, change the "wsl" to "linux_wsl" in my PR; use if string starts with 'linux' to check in other files (such as in lua/neorg/external/helpers.lua)
3. add another function to check if is wsl (such as add function neorg.configuration.os_is_wsl)

If you think the PR is suitable and reasonable, but prefer the 2nd solution or the 3rd solution, please leave a message.

[vhyrro]

I think this PR is good as is! Thank you :D