feat: add paused for subscriptions init object

[logaretm]

What

Adds a paused boolean for useSubscription which starts the subscription in lazy mode, to initialize it you need to call resume().

Usage:

const { data } = useSubscription({
  query: SubscriptionQuery,
  paused: true,
})

closes #142

[codecov-commenter]

Codecov Report

Merging #143 (30851fa) into main (4641149) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #143      +/-   ##
==========================================
+ Coverage   94.70%   94.78%   +0.07%     
==========================================
  Files          26       26              
  Lines         529      537       +8     
  Branches       96       99       +3     
==========================================
+ Hits          501      509       +8     
  Misses         28       28              

Impacted Files	Coverage Δ
packages/villus/src/Mutation.ts	100.00% <100.00%> (ø)
packages/villus/src/Query.ts	100.00% <100.00%> (ø)
packages/villus/src/Subscription.ts	94.44% <100.00%> (+0.69%)	⬆️
packages/villus/src/useSubscription.ts	92.72% <100.00%> (+0.41%)	⬆️

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