feat: Expose isIncluded in module info

[william57m]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

• resolves Expose isIncluded #4297

Description

This PR exposesisIncluded in ModuleInfo.
In the context of writing plugin, this information can be quite useful to know if a module is included or not (regarding if it is removed by tree-shaking).
While this information can only be valid at some point in the bundling flow, the value will only be valid in the generate phase (BuildPhase.GENERATE). Otherwise, like for external module (where the informations is not available), null is returned.

[codecov]

Codecov Report

Merging #4305 (094e258) into master (28cc198) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4305   +/-   ##
=======================================
  Coverage   98.45%   98.45%           
=======================================
  Files         205      205           
  Lines        7311     7314    +3     
  Branches     2082     2083    +1     
=======================================
+ Hits         7198     7201    +3     
  Misses         55       55           
  Partials       58       58           

Impacted Files	Coverage Δ
src/ExternalModule.ts	100.00% <ø> (ø)
src/Module.ts	100.00% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 28cc198...094e258. Read the comment docs.

[lukastaegert]

Looks good, thanks a lot!