* add new function headers
* new encoding function
* rename to decode_micro and add helper functions
* implement new decoding function
* add test for buffer to buffer decoding
* - add notice to GO code
- v fmt base64.v
* implement new decoding function
* fix base64_memory_test.v by commenting a few lines
* vfmt base64.v
* add some more asserts to base64_memory_test.v
* remove unused decoding function
* add bounds check, when detecting the padding
* use union for storing the decoded data
Co-authored-by: Delyan Angelov <delian66@gmail.com>
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