doc: added tutorials for helper and dynamic decoding/encoding

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 94.47%. Comparing base (73c5d1e) to head (cca6ad2).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #64 +/- ## ======================================= Coverage 94.47% 94.47% ======================================= Files 100 100 Lines 3349 3349 ======================================= Hits 3164 3164 Misses 185 185 ```

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