Add exports for Node ESM resolution

[davidmyersdev]

Some bundlers can't resolve the correct ESM imports for sinuous due to the lack of a "type": "module" definition along with "exports" definitions for each package. Specifically, this will allow sinuous to work with vitest.

Check out this explanation on dual packaging for more info.

[codecov[bot]]

Codecov Report

Merging #201 (4997b1a) into main (c7beffd) will increase coverage by 99.67%. The diff coverage is n/a.

@@            Coverage Diff            @@
##           main     #201       +/-   ##
=========================================
+ Coverage      0   99.67%   +99.67%     
=========================================
  Files         0       18       +18     
  Lines         0      609      +609     
=========================================
+ Hits          0      607      +607     
- Misses        0        2        +2     

Impacted Files	Coverage Δ
packages/sinuous/render/src/render.js	100.00% <0.00%> (ø)
packages/sinuous/h/src/property.js	100.00% <0.00%> (ø)
packages/sinuous/h/src/remove-nodes.js	100.00% <0.00%> (ø)
packages/sinuous/h/src/add.js	100.00% <0.00%> (ø)
packages/sinuous/h/src/api.js	100.00% <0.00%> (ø)
packages/sinuous/data/src/data.js	100.00% <0.00%> (ø)
packages/sinuous/hydrate/src/index.js	100.00% <0.00%> (ø)
packages/sinuous/hydrate/src/hydrate.js	100.00% <0.00%> (ø)
packages/sinuous/template/src/template.js	100.00% <0.00%> (ø)
packages/sinuous/observable/src/observable.js	100.00% <0.00%> (ø)
... and 8 more

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[luwes]

"type": "module" I had to revert because it was causing issues with the site build. hope it still works with the exports