Reintroduce map phase XML tag

[applenick]

Reintroduce map phase XML tag

This PR reintroduces the map phase tag, allowing for map authors to identify whether their map is in a DEVELOPMENT or PRODUCTION phase. In addition to including the xml tag, the phase will now be displayed under /map for those with the debug perm. Also /maps can now be filtered by using the -p [phase] flag. Maps in the development phase are hidden from /maps by default.

XML Example

<phase>development</phase> # Identify the map is in a developmental stage
<phase>production</phase> # Identify the map is in a production stage (production is the default value)

/maps and /map Example

Example of /map when a map is in the PRODUCTION phase

Example of using /map which now has a -p [phase] flag

As always, please let me know if there's any suggestions! 👍

Signed-off-by: applenick applenick@users.noreply.github.com