fix: incorrect export of enums

[cincauhangus]

Which problem is this PR solving?

• Some enums are incorrectly exported as a type as a result of commit 60612f2 (PR: chore: set isolatedModules compilation option #2839)

Short description of the changes

• Follow up from fix: export KoaLayerType enum correctly #2873
• Fixed the exports

[cincauhangus]

Hi @david-luna, FYI I created a separate PR as these are packages I don't use but found similar export issues through a code search.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.68%. Comparing base (8820f65) to head (c905328).
Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2876   +/-   ##
=======================================
  Coverage   89.68%   89.68%           
=======================================
  Files         186      187    +1     
  Lines        9053     9059    +6     
  Branches     1857     1858    +1     
=======================================
+ Hits         8119     8125    +6     
  Misses        934      934           

see 1 file with indirect coverage changes

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