New native recipient types

[str4d]

As added to the age specification in https://github.com/C2SP/C2SP/pull/156.

[codecov[bot]]

Codecov Report

:x: Patch coverage is 60.65574% with 24 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 54.79%. Comparing base (75731ce) to head (dfbea00).

Files with missing lines	Patch %	Lines
age/src/native/p256tag.rs	52.38%	20 Missing :warning:
age/src/native.rs	0.00%	3 Missing :warning:
age/src/cli_common/recipients.rs	50.00%	1 Missing :warning:

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #590      +/-   ##
==========================================
+ Coverage   54.73%   54.79%   +0.06%     
==========================================
  Files          43       45       +2     
  Lines        4288     4349      +61     
==========================================
+ Hits         2347     2383      +36     
- Misses       1941     1966      +25     

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