5 add maybe and result utility functions for base python types

[katunilya]

• Add pf str.center function (Add point-free utility functions #5)
• Add pf str.count function (Add point-free utility functions #5)
• fixup! Add pf str.count function (Add point-free utility functions #5)
• fixup! Add pf str.center function (Add point-free utility functions #5)
• Add pf str.encode function (Add point-free utility functions #5)
• Add pf str.center function (Add point-free utility functions #5)
• Specify Exception type directly for safe and safe_async (Improve safe and safe_async typing #23)
• Add pf str.encode function (Add point-free utility functions #5)
• Add pf str.endswith function (Add point-free utility functions #5)
• Add pf str.find function (Add point-free utility functions #5)
• Add pf str.join function accepts iter str (Add point-free utility functions #5)
• Add pf str.join function (Add point-free utility functions #5)
• Add pf str.removeprefix function (Add point-free utility functions #5)
• Add pf str.removesuffix function (Add point-free utility functions #5)
• Add pf str.replace function (Add point-free utility functions #5)
• Add pf str.split function (Add point-free utility functions #5)
• Add pf str.startswith function (Add point-free utility functions #5)
• Add pf str.strip function (Add point-free utility functions #5)
• Add pf bytes.center function (Add point-free utility functions #5)
• Add pf bytes.count function (Add point-free utility functions #5)
• Add pf bytes.decode function (Add point-free utility functions #5)
• Add pf bytes.endswith function (Add point-free utility functions #5)
• Add pf bytes.find function (Add point-free utility functions #5)
• Add pf bytes.index function (Add point-free utility functions #5)
• Add pf bytes.removeprefix function (Add point-free utility functions #5)
• Add pf bytes.removesuffix function (Add point-free utility functions #5)
• Add pf bytes.replace function (Add point-free utility functions #5)
• Add pf bytes.split function (Add point-free utility functions #5)
• Add pf bytes.startswith function (Add point-free utility functions #5)
• Add pf bytes.strip function (Add point-free utility functions #5)
• Rename bytes.py -> bytes_utils.py (Add point-free utility functions #5)
• Rename string.py -> str_utils.py (Add point-free utility functions #5)
• Add pf dict[key] function (Add point-free utility functions #5)
• Add pf dict.get function - maybe_get (Add point-free utility functions #5)
• Add renamed imports to poinfree package (Add point-free utility functions #5)
• Add pf str.center function (Add point-free utility functions #5)
• Add pf str.count function (Add point-free utility functions #5)
• Add pf str.encode function (Add point-free utility functions #5)
• Add pf bytes.center function (Add point-free utility functions #5)
• Add pf bytes.count function (Add point-free utility functions #5)
• Add pf bytes.decode function (Add point-free utility functions #5)
• Add pf bytes.endswith function (Add point-free utility functions #5)
• Add pf bytes.find function (Add point-free utility functions #5)
• Add pf bytes.index function (Add point-free utility functions #5)
• Add pf bytes.removeprefix function (Add point-free utility functions #5)
• Add pf bytes.removesuffix function (Add point-free utility functions #5)
• Add pf bytes.replace function (Add point-free utility functions #5)
• Add pf bytes.split function (Add point-free utility functions #5)
• Add pf bytes.startswith function (Add point-free utility functions #5)
• Add pf bytes.strip function (Add point-free utility functions #5)
• Rename bytes.py -> bytes_utils.py (Add point-free utility functions #5)
• Rename string.py -> str_utils.py (Add point-free utility functions #5)
• Add pf dict[key] function (Add point-free utility functions #5)
• Add pf dict.get function - maybe_get (Add point-free utility functions #5)
• Add renamed imports to poinfree package (Add point-free utility functions #5)
• Add pf str.center function (Add point-free utility functions #5)
• Add pf str.encode function (Add point-free utility functions #5)
• Add pf bytes.center function (Add point-free utility functions #5)
• Add pf bytes.count function (Add point-free utility functions #5)
• Add pf bytes.decode function (Add point-free utility functions #5)
• Add pf bytes.endswith function (Add point-free utility functions #5)
• Add pf bytes.find function (Add point-free utility functions #5)
• Add pf bytes.index function (Add point-free utility functions #5)
• Add pf bytes.removeprefix function (Add point-free utility functions #5)
• Add pf bytes.removesuffix function (Add point-free utility functions #5)
• Add pf bytes.replace function (Add point-free utility functions #5)
• Add pf bytes.split function (Add point-free utility functions #5)
• Add pf bytes.startswith function (Add point-free utility functions #5)
• Add pf bytes.strip function (Add point-free utility functions #5)
• Rename bytes.py -> bytes_utils.py (Add point-free utility functions #5)
• Rename string.py -> str_utils.py (Add point-free utility functions #5)
• Add pf dict[key] function (Add point-free utility functions #5)
• Add pf dict.get function - maybe_get (Add point-free utility functions #5)
• Add renamed imports to poinfree package (Add point-free utility functions #5)
• Add pf str.center function (Add point-free utility functions #5)
• Add pf str.count function (Add point-free utility functions #5)
• Add pf str.encode function (Add point-free utility functions #5)
• Add pf bytes.center function (Add point-free utility functions #5)
• Add pf bytes.count function (Add point-free utility functions #5)
• Add pf bytes.decode function (Add point-free utility functions #5)
• Add pf bytes.endswith function (Add point-free utility functions #5)
• Add pf bytes.find function (Add point-free utility functions #5)
• Add pf bytes.index function (Add point-free utility functions #5)
• Add pf bytes.removeprefix function (Add point-free utility functions #5)
• Add pf bytes.removesuffix function (Add point-free utility functions #5)
• Add pf bytes.replace function (Add point-free utility functions #5)
• Add pf bytes.split function (Add point-free utility functions #5)
• Add pf bytes.startswith function (Add point-free utility functions #5)
• Add pf bytes.strip function (Add point-free utility functions #5)
• Rename bytes.py -> bytes_utils.py (Add point-free utility functions #5)
• Rename string.py -> str_utils.py (Add point-free utility functions #5)
• Add pf dict[key] function (Add point-free utility functions #5)
• Add pf dict.get function - maybe_get (Add point-free utility functions #5)