Rename to CE-modern, a 1.7.10 port of CE

Position this mod as a port of CE instead of BCx.

- Rename the mod to CE-modern (modid cemodern) and the package to
  net.kanawo.cemodern; the main class is now CEModern.
- Move assets to assets/cemodern and rename the lang key and EMC save
  data to match.
- Describe the mod as a port of CE in the README and mcmod.info.

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

gradle.properties

@@ -3,15 +3,15 @@
 gtnh.settings.blowdryerTag = 0.2.2
 
 # Human-readable mod name, available for mcmod.info population.
-modName = BCx-modern
+modName = CE-modern
 
 # Case-sensitive identifier string, available for mcmod.info population and used for automatic mixin JSON generation.
 # Conventionally lowercase.
-modId = bcxmodern
+modId = cemodern
 
 # Root package of the mod, used to find various classes in other properties,
 # mcmod.info substitution, enabling assertions in run tasks, etc.
-modGroup = net.kanawo.bcxmodern
+modGroup = net.kanawo.cemodern
 
 # Whether to use modGroup as the maven publishing group.
 # When false, com.github.GTNewHorizons is used.
@@ -74,7 +74,7 @@ enableGenericInjection = true
 # Generate a class with a String field for the mod version named as defined below.
 # If generateGradleTokenClass is empty or not missing, no such class will be generated.
 # If gradleTokenVersion is empty or missing, the field will not be present in the class.
-generateGradleTokenClass = net.kanawo.bcxmodern.Tags
+generateGradleTokenClass = net.kanawo.cemodern.Tags
 
 # Name of the token containing the project's current version to generate/replace.
 gradleTokenVersion = VERSION