fix: Move deprecated init kwargs to proper fields

[tlambert03]

moves deprecated field names in init:

    # UserWarning: Field 'm' is deprecated. Use 'ms' instead.
    mapann = model.MapAnnotation(
        id="Annotation:3",
        value=model.Map(m=[{"k": "key", "value": "value"}]), 
    )

    assert len(mapann.value.ms) == 1

[codecov]

Codecov Report

Merging #194 (f56fed3) into main (a329034) will decrease coverage by 0.23%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##             main     #194      +/-   ##
==========================================
- Coverage   31.07%   30.85%   -0.23%     
==========================================
  Files          25       25              
  Lines         840      846       +6     
==========================================
  Hits          261      261              
- Misses        579      585       +6     

Impacted Files	Coverage Δ
src/ome_types/_mixins/_base_type.py	0.00% <0.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more