Fixes #41823

Chunks based text buffer

fixes #41778

Correct "branchs" to "branches" typo

* adding suggestion to search for extension when files are of unknown mime type

* delaying file based suggestions to allow mime types to be populated

* adding telemetry and responding to ramya's feedback

* Fix rebase errors, duplicate key error, tests & prompt only once for file type

Fixes #27392

**Bug**
We currently only make a single code action request for all diagnostics, with a range the covers the span of all diagnostics. However the TS Server API actually expects a code action request for each diagnostic (both the code and range of the code action request has to exactly match that of the diagnostic it aims to fix).

The result is that for overlapping diagnotics where there are multiple fixes, we only  would get code actions for the outermost diagnostic

**Fix**
Make a code action request per diagnostic

Clean up terminal config access