feat: URL encoder/decoder

[peckz]

This PR introduces fully functional URL encoder/decoder. Under the hood it uses built in functions to handle URL or string encoding and decoding.

encode(input: string): string

• Encodes the input string.
• If the input is a valid URL, it uses encodeURI() to encode the entire URL.
• If the input is not a valid URL, it falls back to encodeURIComponent() to encode the string as a URI component.

decode(input: string): string

• Decodes the input string.
• Checks if the input starts with a protocol (http:// or https://).
• If the input is a valid URL, it uses decodeURI() to decode the entire URL.
• If the input does not have a protocol, it uses decodeURIComponent() to decode the string as a URI component.
• Returns "Invalid URL format" for malformed URLs.