NSS try to create path, filename containing invalid windows characters like colon

@timbl @michielbdejong @RubenVerborgh @highlevellogic

Trying NSS on a windows pod https://bourgeoa.solid.hll.nu:7443 . Tested the chat with me from OS solid
The function returns a PUT error 500

FAILED to save new chat channel at: https://bourgeoa.solid.hll.nu:7443/IndividualChats/bourgeoa.solid.hll.nu:7443/index.ttl : Web error: 500 (Internal Server Error) on PUT of https://bourgeoa.solid.hll.nu:7443/IndividualChats/bourgeoa.solid.hll.nu:7443/index.ttl

This is due to the colon : in the folderPath

To ensure solid compatibility can we forbid the windows forbidden characters in pathName like \/:*%"<>| ?
This could be done in resource-mapper.js
Should it be OS dependent to allow any file OS file be URI capable.

index:name.ttl is valid POSIX file and URI, but invalid WINDOWS

从 resource-mapper.js 开始，跟踪请求的 URI 如何转换为 Windows 文件系统路径。在 Windows 上使用包含冒号的路径重现 chat-channel PUT，然后确定处理是否应依赖操作系统，同时保持与有效 URI 路径的兼容性。当请求不再因 Windows 禁止的路径字符而失败时，即表示完成。