Require the exp_reports commands instead of loading them (#482)

Files under "load" in module.json are passed to event_handler.add_lib, so
they must return an event handler table. commands.lua registers the report
commands and returns nothing, so require gave true and every instance with
exp_reports enabled failed in on_load with "attempt to index local 'lib'
(a boolean value)". Listed under "require" it runs the same way the
exp_commands command files do.

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>

exp_reports/module/module.json

@@ -1,10 +1,10 @@
 {
 	"name": "exp_reports",
 	"load": [
-		"commands.lua"
 	],
 	"require": [
-		"globals.lua"
+		"globals.lua",
+		"commands.lua"
 	],
 	"dependencies": {
 		"clusterio": "*",