Checked NaiveWeek methods

[bragov4ik]

Currently, all NaiveWeek's public methods panic on overflow. This PR allows to handle such scenarios.

Seems to solve #1469 (NaiveWeek part).

• I'm not sure that Result makes sense here, since only overflow results in None. Thus Option.
• Adding checked_* methods in order to not break API

[codecov]

Codecov Report

Attention: Patch coverage is 88.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 91.11%. Comparing base (1eb3174) to head (473f7c2).
Report is 8 commits behind head on main.

Files	Patch %	Lines
src/naive/mod.rs	88.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1600      +/-   ##
==========================================
- Coverage   91.12%   91.11%   -0.02%     
==========================================
  Files          37       37              
  Lines       17057    17104      +47     
==========================================
+ Hits        15543    15584      +41     
- Misses       1514     1520       +6     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

[djc]

This makes sense to me, thanks. In its current form the diffs get a little ugly, would you mind doing this with one commit per method and putting the panicking method above the checked method? Also probably prefer not to use the "recoverable"/"recover" wording which IMO is not used very often.

[djc]

LGTM modulo one nit, thanks! (Please fix it in the originating commit.)