fix(api)!: Renaming classes and creating a default package object

A class which provides the ConfigValue Object was not a good deal
Now there's a default package object called configparser which gives a Config(old ConfigValue) object

Author: BrunoSilvaAndrade

README.md

@@ -107,11 +107,12 @@ This config file as a json would be something like:
 The instance of Config Class:
 
 ```python
-from pyconfigparser import configparser, ConfigError
+from pyconfigparser import Configparser, ConfigError
 import logging
 
 try:
-    config = configparser.get_config(SCHEMA_CONFIG)  # <- Here I'm using that SCHEMA_CONFIG we had declared, and the dir file default value is being used
+    config = Configparser.get_config(
+        SCHEMA_CONFIG)  # <- Here I'm using that SCHEMA_CONFIG we had declared, and the dir file default value is being used
 except ConfigError as e:
     print(e)
     exit()
@@ -149,17 +150,17 @@ Since you've already created the first Config's instance this instance will be c
 so after this first creation you can just invoke Config.get_config()
 
 ```python
-from pyconfigparser import configparser
+from pyconfigparser import Configparser
 
-config = configparser.get_config()  # At this point you already have the configuration properties in your config object
+config = Configparser.get_config()  # At this point you already have the configuration properties in your config object
 ```
 
 You can also disable the action to cache the instance config
 
 ```python
-from pyconfigparser import configparser
+from pyconfigparser import Configparser
 
-configparser.hold_an_instance = False
+Configparser.hold_an_instance = False
 ```