Towards #40551Our old CodeMirror Blob logic assumed that all highlightingoccurrences enclosed a single line and had no overlaps between them,while the syntect server regularly returned multilineoccurrences with potential overlaps. This commit updates thelogic to split multiline and overlapping occurrences theassumption is correct resulting in improved highlighting.This commit does not fix all highlighting issues with the new blob view,we still need to support more "scopes" from syntect, and we need torefine the actual CSS colors for the SCIP syntax kind classes.
Test plan
Ran the server locally and manually verified that the syntax highlighting has improved for the CodeMirror blob view
