Address Qt 6.7 CMake API review notes for webassembly

See action points from https://git.qt.io/alcroito/qt6-cmake-api-review/-/blob/master/api_review_qt_6_7.md#qt_wasm_maximum_memory-new-variable

AP: Fix applicataion typo

AP: Link to better emscripten compiler page, rather than to top of github

AP: Have a meeting with wasm guys, what do we want to achieve, can we provide a better API, rather than one variable per compile option, something like a dictionary with defaults that can be modified per key, also figure out if we want to document in qmake and whether it will
be the same kind of dictionary style assignments

AP: Keep TP because of the above AP

AP: Don't document qmake for 6.7 at the moment