Provide a simple global search

Finding things in a project is not easy without forward knowledge of what to look for, and even then searching is still bound by the contents of a single source file. This feature would add simple global search (scope to be defined?! ideally would support ALL reachable source files, even if the result is initially only displayed in the search result popover when the file is not editable, but ideally, any of the source files should be at least VIEWABLE)

Proposed UI is the same as eclipse/intellij

Just testing what the user experience would be (popover arrow should be right aligned?!)

Alternatively could be done via a editor-centered popup.

The issue names no files, tests, or entry points; start by examining the current single-source-file search and the proposed Eclipse/IntelliJ-style UI. Define the reachable-file scope and behavior for non-editable files before implementation. Done means global results are shown and source files can at least be viewed.

Written by the indexing model from the issue text.