Write VS Code settings when generating a new project.

[toinehartman]

Create a .vscode folder with basic settings (excluding the target folder from search results) for new Rascal projects.

Related to usethesource/rascal-language-servers#941.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 46%. Comparing base (188a7c6) to head (f26a55c).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##              main   #2594   +/-   ##
=======================================
- Coverage       46%     46%   -1%     
+ Complexity    6632    6623    -9     
=======================================
  Files          793     793           
  Lines        65629   65629           
  Branches      9830    9830           
=======================================
- Hits         30490   30483    -7     
- Misses       32784   32794   +10     
+ Partials      2355    2352    -3     

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