sqlite: make SQLTagStore.prototype.size a getter

[Renegade334]

As implemented, .db and .capacity are getters, and .size is a callable method. There's no reason for this inconsistency, so change .size to a getter.

Drive-by changes while making alterations to the class template:

• The FunctionCallbackInfo parameter for SQLTagStore member functions was variably labelled args or info, and wasn't consistent with the header either. Use the canonical args.

[nodejs-github-bot]

Review requested:

• @nodejs/sqlite

[cjihrig]

LGTM, but all of the stylistic changes should really be made separately.

[Renegade334]

LGTM, but all of the stylistic changes should really be made separately.

I'm already half-addressing them de facto with the main change, but these can be spun out if desired.

Edit: Spun out the other doc changes.

[codecov]

Codecov Report

❌ Patch coverage is 80.95238% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 88.55%. Comparing base (5cf3c3e) to head (a2eaaa0).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
src/node_sqlite.cc	80.95%	0 Missing and 4 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #60246      +/-   ##
==========================================
- Coverage   88.56%   88.55%   -0.02%     
==========================================
  Files         704      704              
  Lines      208146   208155       +9     
  Branches    40009    40027      +18     
==========================================
- Hits       184354   184338      -16     
- Misses      15814    15824      +10     
- Partials     7978     7993      +15     

Files with missing lines	Coverage Δ
src/node_sqlite.h	80.39% <ø> (ø)
src/node_sqlite.cc	80.14% <80.95%> (-0.01%)	⬇️

... and 29 files with indirect coverage changes

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