Generic: Add spacing around dot in compound field access adjacent to numbers

[LucaCappelletti94]

This PR renders compound field access with spaces around . when adjacent to a numeric expression (e.g. 1 . i or (a . 1 . b)), preventing tokens from merging into decimal numeric literals on roundtrip display.

SELECT (1 . i);
-- Formatted as: SELECT (1.i)
-- Re-parse error: Expected: ), found: i

[codecov-commenter]

Codecov Report

❌ Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.10%. Comparing base (bfc7d38) to head (1b6328d).

Files with missing lines	Patch %	Lines
src/ast/mod.rs	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2543   +/-   ##
=======================================
  Coverage   81.09%   81.10%           
=======================================
  Files          42       42           
  Lines       33682    33684    +2     
  Branches    33682    33684    +2     
=======================================
+ Hits        27316    27318    +2     
  Misses       2796     2796           
  Partials     3570     3570           

☔ View full report in Codecov by Harness.
📢 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.

[alamb]

Thank you @LucaCappelletti94