refactor: rename Aternos\Mclogs to IndifferentKetchup\Iblogs

Bulk substitution across all PHP files in src/, build.php, worker.php,
and web/frontend/. Updates composer.json's package name and PSR-4
autoload root accordingly. Casing matches the existing
IndifferentKetchup\Codex package's namespace convention (capital K).

Strictly a namespace rename. Aternos\Codex\* imports remain in place;
those get re-pointed in a follow-up commit when the codex Composer
dependency itself is swapped. Filename renames (docker/mclogs.ini,
web/public/css/mclogs.css), README walk-through, env-var prefix changes,
and visible-text branding land in subsequent commits.

src/Config/Config.php

@@ -1,9 +1,9 @@
 <?php
 
-namespace Aternos\Mclogs\Config;
+namespace IndifferentKetchup\Iblogs\Config;
 
-use Aternos\Mclogs\Util\Singleton;
-use Aternos\Mclogs\Util\URL;
+use IndifferentKetchup\Iblogs\Util\Singleton;
+use IndifferentKetchup\Iblogs\Util\URL;
 
 class Config
 {

src/Config/ConfigKey.php

@@ -1,6 +1,6 @@
 <?php
 
-namespace Aternos\Mclogs\Config;
+namespace IndifferentKetchup\Iblogs\Config;
 
 enum ConfigKey
 {
@@ -40,7 +40,7 @@ enum ConfigKey
             ConfigKey::STORAGE_LIMIT_LINES => 25000,
 
             ConfigKey::MONGODB_URL => 'mongodb://mongo:27017',
-            ConfigKey::MONGODB_DATABASE => 'mclogs',
+            ConfigKey::MONGODB_DATABASE => 'iblogs',
 
             ConfigKey::ID_LENGTH => 7,
 
@@ -66,7 +66,7 @@ enum ConfigKey
      */
     public function getEnvironmentVariable(): string
     {
-        return "MCLOGS_" . $this->name;
+        return "IBLOGS_" . $this->name;
     }
 
     /**