Added ISyntaxNodeProvider to Skimmed type system member definitions

[glen-84]

Summary of the changes (Less than 80 chars)

• Added ISyntaxNodeProvider to Skimmed type system member definitions.

---

Notes:

• I decided to add this to most (if not all) type system members, instead of creating an issue for the rest.
• I added RewriteMissingType to SchemaDebugFormatter, because MissingTypeDefinition implements INamedTypeDefinition which implements ISyntaxNodeProvider, so it also needed an implementation of ToSyntaxNode.
• I updated RewriteDirectiveLocation to format the location, otherwise it's printed in PascalCase.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.36%. Comparing base (b40f1f4) to head (02d5794).
Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #7938      +/-   ##
==========================================
+ Coverage   74.33%   74.36%   +0.02%     
==========================================
  Files        2880     2880              
  Lines      150303   150336      +33     
  Branches    17480    17482       +2     
==========================================
+ Hits       111722   111790      +68     
+ Misses      32765    32726      -39     
- Partials     5816     5820       +4     

Flag	Coverage Δ
unittests	74.36% <ø> (+0.02%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.