chore: organize core pepr files into lib/core/

[samayer12]

Description

While reviewing how journey/ tests can be refactored, several files in lib/ seemed to represent core functionality about Pepr.

For clarity, we may want to move them to a shared folder. The impacted files are:

src/lib/capability.ts
src/lib/module.ts
src/lib/queue.ts
src/lib/storage.ts
src/lib/schedule.ts
src/lib/capability.test.ts
src/lib/module.test.ts
src/lib/queue.test.ts
src/lib/storage.test.ts
src/lib/schedule.test.ts

If we feel this represents core Pepr functionality and provides more clarity than leaving them in lib/ at the top-level, we should consider this PR.

End to End Test:
(See Pepr Excellent Examples)

Related Issue

None

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Other (security config, docs update, etc)

Checklist before merging

• Unit, Journey, E2E Tests, docs, adr added or updated as needed
• Contributor Guide Steps followed

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.09%. Comparing base (73831e0) to head (86e37c3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1594   +/-   ##
=======================================
  Coverage   81.09%   81.09%           
=======================================
  Files          41       41           
  Lines        1947     1947           
  Branches      431      404   -27     
=======================================
  Hits         1579     1579           
- Misses        340      366   +26     
+ Partials       28        2   -26     

Files with missing lines	Coverage Δ
src/lib.ts	100.00% <100.00%> (ø)
src/lib/assets/pods.ts	94.64% <ø> (ø)
src/lib/controller/index.ts	10.40% <100.00%> (ø)
src/lib/controller/store.ts	12.00% <ø> (ø)
src/lib/controller/storeCache.ts	100.00% <ø> (ø)
src/lib/core/capability.ts	94.90% <100.00%> (ø)
src/lib/core/module.ts	81.25% <100.00%> (ø)
src/lib/core/queue.ts	100.00% <100.00%> (ø)
src/lib/core/schedule.ts	100.00% <ø> (ø)
src/lib/core/storage.ts	83.56% <ø> (ø)
... and 3 more

... and 1 file with indirect coverage changes