fix: declare JEI as optional dependency in neoforge.mods.toml

JEI integration existed via annotation discovery but had no dependency
declaration, meaning load ordering was not guaranteed. Adding it as
optional with ordering=AFTER ensures correct initialization order when
JEI is present alongside the existing EMI declaration.

Author: MrSilly07

src/main/resources/META-INF/neoforge.mods.toml

@@ -50,3 +50,10 @@ type = "optional"
 versionRange = "[1.21,)"
 ordering = "AFTER"
 side = "BOTH"
+
+[[dependencies.${mod_id}]]
+modId = "jei"
+type = "optional"
+versionRange = "[19.0,)"
+ordering = "AFTER"
+side = "CLIENT"