fix(ui): support notify.<type> with no explicit type field

[JosephKav]

Zod wasn't recognising
notify.matrix as type matrix

notify:
    matrix:
        url_fields:
            ...

was requiring

notify:
    matrix:
        type: matrix
        url_fields:
            ...

This makes it fallback to name if type isn't explicitly provided (and checks that name is of a supported type)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.82%. Comparing base (f119217) to head (0be1bd8).
⚠️ Report is 13 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #704   +/-   ##
=======================================
  Coverage   98.82%   98.82%           
=======================================
  Files         132      132           
  Lines        8891     8891           
=======================================
  Hits         8786     8786           
  Misses         80       80           
  Partials       25       25           

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