No longer wrapping complex types in an auxiliary JSON object

[rodinaarssen]

Complex types were wrapped in an auxiliary object to avoid ambiguities between the JSON representation of containers and "lists as a sole argument" on the JSON-RPC level. This is not necessary, as complex types are not automatically deserializable through this path anyway. This PR removes wrapping around complex types, leaving rationals as the only values that are wrapped when encoding values as JSON objects.

FIxes usethesource/rascal-language-servers#944

[codecov]

Codecov Report

❌ Patch coverage is 0% with 15 lines in your changes missing coverage. Please review.
✅ Project coverage is 46%. Comparing base (3ba2f34) to head (3e22617).
⚠️ Report is 13 commits behind head on main.

Files with missing lines	Patch %	Lines
src/org/rascalmpl/ideservices/GsonUtils.java	0%	14 Missing ⚠️
...c/org/rascalmpl/ideservices/RemoteIDEServices.java	0%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##              main   #2599   +/-   ##
=======================================
  Coverage       46%     46%           
- Complexity    6623    6640   +17     
=======================================
  Files          793     793           
  Lines        65638   65695   +57     
  Branches      9831    9840    +9     
=======================================
+ Hits         30480   30513   +33     
- Misses       32804   32827   +23     
- Partials      2354    2355    +1     

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

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.