Move var helpers into their own file, log update with additional levels

Add levels for ALERT, EMERGENCY to be syslog compatible
Add direct wrappers for all, but they are not yet fully usable because the stack fix is not yet implemented

Add a new debug helepr to get the stack as a string

src/corelibs/string_handling/string_helpers.py

@@ -2,7 +2,6 @@
 String helpers
 """
 
-from typing import Any
 from decimal import Decimal, getcontext
 from textwrap import shorten
 
@@ -102,62 +101,4 @@ def format_number(number: float, precision: int = 0) -> str:
         "f}"
     ).format(_number)
 
-
-def is_int(string: Any) -> bool:
-    """
-    check if a value is int
-
-    Arguments:
-        string {Any} -- _description_
-
-    Returns:
-        bool -- _description_
-    """
-    try:
-        int(string)
-        return True
-    except TypeError:
-        return False
-    except ValueError:
-        return False
-
-
-def is_float(string: Any) -> bool:
-    """
-    check if a value is float
-
-    Arguments:
-        string {Any} -- _description_
-
-    Returns:
-        bool -- _description_
-    """
-    try:
-        float(string)
-        return True
-    except TypeError:
-        return False
-    except ValueError:
-        return False
-
-
-def str_to_bool(string: str):
-    """
-    convert string to bool
-
-    Arguments:
-        s {str} -- _description_
-
-    Raises:
-        ValueError: _description_
-
-    Returns:
-        _type_ -- _description_
-    """
-    if string == "True" or string == "true":
-        return True
-    if string == "False" or string == "false":
-        return False
-    raise ValueError(f"Invalid boolean string: {string}")
-
 # __END__