Replace moment-timezone with Temporal

[dathbe]

As the title suggests

[dathbe]

Counts (completed):
MMM-MyScoreboard.js - 4/9
node_helper.js - 2/4
providers/CPL.js - 2/3
providers/ESPN.js - 2/13
providers/ESPN_Scorepanel.js - 2/9
providers/PWHL.js - 2/15
providers/SNET.js - 2/10
providers/SNET_YD.js - 2/10

Other files needing updating:
CHANGELOG.md
README.md
package.json

[gerber55555]

@dathbe, do you want me to have Claude do this? I saw you already have a branch out, but I'm sure it would be pretty trivial with Claude Code.

[dathbe]

This is a low priority. There's nothing technically wrong with moment-timezone right now. Though I would like to migrate eventually. If Claude can get it working, great.