[saiyam-jain-dev]

Describe your change

• Add an algorithm?
• Fix a bug or typo in an existing algorithm?
• Add or change doctests? -- Note: Please avoid changing both code and tests in a single pull request.
• Documentation change?

RFC 4648 Base32 operates on binary byte streams. The previous implementation in ciphers/base32.py had several correctness issues:

1. Encoding empty input �"" produced �"A=======" instead of �"".
2. Decoding values with high-byte representations (such as �"74======", which corresponds to byte xff) crashed with UnicodeDecodeError or corrupted values because it decoded intermediate binary chunks as UTF-8 text strings (.decode("utf-8")) and operated on ord(chr).
3. Non-ASCII binary payloads could not be round-tripped reliably.

This PR:

• Refactors �ase32_encode and �ase32_decode to operate strictly on raw bytes and bit manipulation adhering to RFC 4648.
• Produces identical results to Python standard library �ase64.b32encode and �ase64.b32decode.
• Properly handles empty inputs, padding, and all 8-bit byte values.
• Adds comprehensive doctests comparing against standard library implementations and RFC test vectors.

Checklist

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized.
• I know that pull requests will not be merged if they fail the automated tests.
• This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms.
• All new Python files are placed inside an existing directory.
• All filenames are in all lowercase characters with no spaces or dashes.
• All functions and variable names follow Python naming conventions.
• All function parameters and return values are annotated with Python type hints.
• All functions have doctests that pass the automated testing.
• All new algorithms include at least one URL that points to Wikipedia or another similar explanation.
• If this pull request resolves one or more open issues, then the description above includes the issue number(s) with a closing keyword: "Fixes #ISSUE-NUMBER".