fix: the text completer didn't export its id

[JeanCASPAR]

Issue #, if available:

Description of changes:
The text completer in text src/autocomplete/text_completer.js now has an ID, which makes things easier to debug.

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Pull Request Checklist:

• No backwards incompatible changes were made to Ace's public interface which is defined through the main typings file (ace.d.ts) and its references:
  • https://github.com/ajaxorg/ace/blob/master/ace.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-modes.d.ts
  • https://github.com/ajaxorg/ace/blob/master/ace-extensions.d.ts

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 87.84%. Comparing base (0207e6d) to head (a2c6fb2).
⚠️ Report is 11 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #5847      +/-   ##
==========================================
+ Coverage   87.77%   87.84%   +0.06%     
==========================================
  Files         620      622       +2     
  Lines       46096    46384     +288     
  Branches     7559     7598      +39     
==========================================
+ Hits        40461    40745     +284     
- Misses       5635     5639       +4     

Flag	Coverage Δ
unittests	87.84% <100.00%> (+0.06%)	⬆️

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