[piexelated]

Adds Zed as a studio editor next to VSCode, on Bukkit and on the modded adapters.

• Pack schemas are mirrored into the pack's .zed/settings.json, so Zed gets JSON schema completion without extra setup.
• Pack files and editors accept JSONC comments.
• New studio.editor setting in iris.json: vscode, zed or none. The command messages and director text now say which editor opens.
• A hash of the schema texts is stored with the Zed settings, so Zed reloads schemas when Iris regenerates them.
• Pack hotload ignores .zed, so writing the settings does not trigger a reload. Bukkit and modded studios now build their watchers through PackHotloadFolder.watch.
• The editor command opens the pack of the currently open studio.
• Modded studios write the same workspace and Zed files.

Language files: the new editor keys replace the old opening_vscode* and open_vscode keys, with translations in all 17 languages.

Depends on VolmitSoftware/VolmLib#2, which adds JSONC comment support to JSONTokener. Iris resolves VolmLib master-SNAPSHOT from JitPack, so this PR only builds upstream after that one merges.

Tested against the VolmLib branch with -PlocalVolmLibDirectory (and VOLMLIB_DIR for adapters):

• ./gradlew :core:test: 7520 tests, 0 failures, 17 skipped
• ./gradlew :adapters:bukkit:plugin:test: 445 tests, 0 failures
• ./gradlew -p adapters/fabric compileJava, -p adapters/neoforge compileJava and -p adapters/forge compileJava: all succeed

Not run in a live Minecraft server or client, and not tested with a real Zed install.