Add RPM control to both agents and crews (#133)

* moving file into utilities
* creating Logger and RPMController
* Adding support for RPM to agents and crew

src/crewai/utilities/i18n.py

@@ -0,0 +1,47 @@
+import json
+import os
+from typing import Dict, Optional
+
+from pydantic import BaseModel, Field, PrivateAttr, ValidationError, model_validator
+
+
+class I18N(BaseModel):
+    _translations: Optional[Dict[str, str]] = PrivateAttr()
+    language: Optional[str] = Field(
+        default="en",
+        description="Language used to load translations",
+    )
+
+    @model_validator(mode="after")
+    def load_translation(self) -> "I18N":
+        """Load translations from a JSON file based on the specified language."""
+        try:
+            dir_path = os.path.dirname(os.path.realpath(__file__))
+            prompts_path = os.path.join(
+                dir_path, f"../translations/{self.language}.json"
+            )
+
+            with open(prompts_path, "r") as f:
+                self._translations = json.load(f)
+        except FileNotFoundError:
+            raise ValidationError(
+                f"Trasnlation file for language '{self.language}' not found."
+            )
+        except json.JSONDecodeError:
+            raise ValidationError(f"Error decoding JSON from the prompts file.")
+        return self
+
+    def slice(self, slice: str) -> str:
+        return self.retrieve("slices", slice)
+
+    def errors(self, error: str) -> str:
+        return self.retrieve("errors", error)
+
+    def tools(self, error: str) -> str:
+        return self.retrieve("tools", error)
+
+    def retrieve(self, kind, key):
+        try:
+            return self._translations[kind].get(key)
+        except:
+            raise ValidationError(f"Translation for '{kind}':'{key}'  not found.")