Merge bitcoin/bitcoin#30875: doc: fixed inconsistencies in documentation between autotools to cmake change

a9964c0444 doc: Updating docs from autotools to cmake (kevkevinpal)

Pull request description:

  A bit of a followup from https://github.com/bitcoin/bitcoin/pull/30840

  - In this change the documentation where we refer to the `./configure` script which is now gone and have converted the configure params to use the `cmake` equivalent.

ACKs for top commit:
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  tdb3:
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Tree-SHA512: f7ed20b8ad61f028c0d242b9cc70650d8da63057d4a8f7da88f0117a8d3241c5fe8fcf19d56ec82088160b9fee9b175fe9f64e5a845260d3696dc7e94bfdd0bd

src/qt/README.md

@@ -99,7 +99,7 @@ sudo apt-get install qtcreator
 #### Setup Qt Creator
 
 1. Make sure you've installed all dependencies specified in your systems build instructions
-2. Follow the compile instructions for your system, run `./configure` with the `--enable-debug` flag
+2. Follow the compile instructions for your system, adding the `-DCMAKE_BUILD_TYPE=Debug` build flag
 3. Start Qt Creator. At the start page, do: `New` -> `Import Project` -> `Import Existing Project`
 4. Enter `bitcoin-qt` as the Project Name and enter the absolute path to `src/qt` as Location
 5. Check over the file selection, you may need to select the `forms` directory (necessary if you intend to edit *.ui files)