If the user has enabled clangd (default is off), we start up one instance
per project when it is opened/changed (including build config switches),
and trigger background indexing.
So far, the index is used to provide results for locators and "Find
Usages".
Per-document functionality such as semantic highlighting and completion
is still provided by libclang.
Change-Id: I12532fca1b9c6278baab560e7238cba6189cde9f
Reviewed-by: David Schulz <david.schulz@qt.io>
Declutter the client and client manager by moving find usage and follow
symbol into this helper. This functionality was "temporary" put into the
client manager, but is more an implementation detail that shouldn't be
handled in that central place. Rename symbol will also go into this
helper class.
Task-number: QTCREATORBUG-21578
Change-Id: I56680f6ccbb8d244066561167178af7b341b8822
Reviewed-by: Christian Stenger <christian.stenger@qt.io>
