Enable word selection with a key modifier.

[manuelxmarquez]

This PR fixes #23957

The click link to gesture feature can be disabled and instead use word selection which is expected by some users as described in the issue.

Test:

1. Open file and confirm holding Ctrl allows click to link gesture
   
2. Hold Ctrl and click comment to place cursor
   
3. Hold Alt and click to place multiple cursors
   
4. Open settings and enable Word Selection
   
5. Hold Ctrl and click the same location from step 1 to select the entire word
   
6. Hold Ctrl and click comment to select the entire word
   
7. Same beahviour as step 3
8. Open settings to change the modifier key "editor.multiCursorModifier": "ctrlCmd" and remove the wordSelection
   
9. Repeat steps 1 to 7 swapping Ctrl for Alt and vice versa

[ghost]

All CLA requirements met.