Expose the TypedEvent conversion trait

[erwanor]

This is a trivial API changes that exposes the tendermint::abci::event::TypedEvent marker trait.

• Referenced an issue explaining the need for the change
• Updated all relevant documentation in docs
• Updated all code comments where relevant
• Wrote tests
• Added entry in .changelog/

[codecov-commenter]

Codecov Report

Merging #1296 (907841a) into main (7955217) will increase coverage by 0.0%.
The diff coverage is n/a.

❗ Current head 907841a differs from pull request most recent head 442dc0c. Consider uploading reports for the commit 442dc0c to get more accurate results

@@          Coverage Diff          @@
##            main   #1296   +/-   ##
=====================================
  Coverage   64.2%   64.3%           
=====================================
  Files        271     271           
  Lines      24450   24450           
=====================================
+ Hits       15719   15722    +3     
+ Misses      8731    8728    -3     

see 4 files with indirect coverage changes

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