Improve qualified import plugin readme

After seeing #2603 might as well improve the docs a little so we can maybe link to it.

plugins/hls-qualify-imported-names-plugin/README.md

@@ -2,6 +2,34 @@
 
 ![Qualify Imported Names Demo](qualify-imported-names-demo.gif)
 
+## Summary
+
+Rewrite imported names to be qualified.
+
+## Motivation
+
+You've imported a number of modules, and have written a lot of code with unqualified names. You want to import a new module but you know there will be a number name clashes so you want to switch your current usage of names to be qualified.
+
+It would be nice if you could change
+```
+import Blah
+```
+to
+```
+import Blah as Bloo
+```
+then magically qualify all the previous names imported from `Blah` with `Bloo`. After doing that you could then change
+```
+import Blah as Bloo
+```
+to
+```
+import qualified Blah as Bloo
+```
+and import your the new module using names from it without worry.
+
+Well, now you can...
+
 ## Usage
 
 1. Put cursor over the import declaration you want to qualify names from.
@@ -14,6 +42,9 @@
 - If the import declaration has an explicit import list then the plugin will qualify only names on the list.
 - If the import declaration has an explicit hiding list then the plugin will qualify names from the imported module that are not on the list.
 
+## Future possibilities
+- It may be possible to use the LSP rename functionality to ask for a name so that we don't have to do the `as Alias` dance.
+
 ## Change log
 ### 1.0.0.1
 - GHC 9.2.1 compatibility