Support for OperationInfo inference on Document.subscribe

[easylogic]

What this PR does / why we need it?

To make it easier to get the message when using doc.subscribe, we specify the type.
we get the type of $.text by referencing Document<{ text: Text } >.

It adds two new features

1. Suggest subscribe path

2. Inferring the OperationInfo type from the subscribe path

Any background context you want to provide?

Knowing in advance that an Operation is going to be subject to certain changes makes it easier to adapt.

What are the relevant tickets?

Fixes #521

Checklist

• Added relevant tests or not required
• Didn't break anything

[codecov]

Codecov Report

Merging #535 (3a7bc0b) into main (8151e8a) will decrease coverage by 0.16%.
The diff coverage is 72.13%.

@@            Coverage Diff             @@
##             main     #535      +/-   ##
==========================================
- Coverage   88.08%   87.93%   -0.16%     
==========================================
  Files          77       77              
  Lines        7386     7432      +46     
  Branches      713      727      +14     
==========================================
+ Hits         6506     6535      +29     
- Misses        607      614       +7     
- Partials      273      283      +10     

Impacted Files	Coverage Δ
src/document/json/element.ts	91.66% <ø> (ø)
src/document/operation/operation.ts	100.00% <ø> (ø)
test/unit/document/document_test.ts	96.00% <71.18%> (-2.05%)	⬇️
src/document/document.ts	73.41% <100.00%> (+0.16%)	⬆️

... and 6 files with indirect coverage changes

[hackerwins]

Thanks for your contribution.
This will provide a more convenient way to use document.Subscribe.