Deprecate search

[jerbly]

Deprecation notices are now shown in the docs, command-line help, command output and in the TUI.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 79.7%. Comparing base (5f71818) to head (057fe8c).
⚠️ Report is 4 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##            main   #1057     +/-   ##
=======================================
+ Coverage   79.2%   79.7%   +0.4%     
=======================================
  Files         92      92             
  Lines       7200    7519    +319     
=======================================
+ Hits        5709    5997    +288     
- Misses      1491    1522     +31     

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