Rename inventory_sync to player_sync

The plugin syncs more than inventories now (settings, appearance, recipe
notifications), so name it for what it does. The package becomes
@clusterio/plugin-player_sync and every inventory_sync identifier follows.

A migration entrypoint renames the inventory_sync config fields, including
load_plugin, and the inventory view permission. The plugin moves
inventories.json in the database directory to player_sync.json and
storage.inventory_sync in saves to storage.player_sync itself, and closes
dialogs left open under the old GUI names on startup.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

plugins/player_sync/module/get_script_data.lua

@@ -0,0 +1,28 @@
+local compat = require("modules/clusterio/compat")
+
+--- @param no_early_return boolean? True to always setup data
+return function(no_early_return)
+	local player_sync = compat.script_data.player_sync
+	if player_sync and not no_early_return then
+		return player_sync
+	end
+
+	-- migrate: inventory_sync was renamed to player_sync in 2.0.0-alpha.28
+	if not player_sync and compat.script_data.inventory_sync then
+		player_sync = compat.script_data.inventory_sync
+		compat.script_data.inventory_sync = nil
+	end
+
+	player_sync = player_sync or {}
+	player_sync.players = player_sync.players or {}
+	player_sync.players_waiting_for_acquire = player_sync.players_waiting_for_acquire or {}
+	player_sync.players_in_cutscene_to_sync = player_sync.players_in_cutscene_to_sync or {}
+	player_sync.failed_deserialization = player_sync.failed_deserialization or {}
+
+	player_sync.active_downloads = player_sync.active_downloads or {}
+	player_sync.finished_downloads = player_sync.finished_downloads or {}
+	player_sync.active_uploads = player_sync.active_uploads or {}
+
+	compat.script_data.player_sync = player_sync
+	return player_sync
+end