More documentation updates for 3.11.0 (#3553)

* mkdocs: add string_view examples

* mkdocs: reference underlying operators

* mkdocs: add operator<=> examples

* mkdocs: fix style check issues

* mkdocs: tweak BJData page

* mkdocs: add CMake option hints to macros

* mkdocs: fix JSON_DISABLE_ENUM_SERIALIZATION definition

* mkdocs: fix link to unit-udt.cpp

* mkdocs: fix "Arbitrary Type Conversions" title

* mkdocs: link to api/macros/*.md instead of features/macros.md

* mkdocs: document JSON_DisableEnumSerialization CMake option

* mkdocs: encode required C++ standard in example files

* docset: detect gsed/sed

* docset: update index

* docset: fix CSS patching

* docset: add list_missing_pages make target

* docset: add list_removed_paths make target

* docset: replace page titles with name from index

* docset: add install target for Zeal docset browser

* Use GCC_TOOL in ci_test_documentation target

docs/mkdocs/docs/api/macros/json_use_implicit_conversions.md

@@ -7,9 +7,6 @@
 When defined to `0`, implicit conversions are switched off. By default, implicit conversions are switched on. The
 value directly affects [`operator ValueType`](../basic_json/operator_ValueType.md).
 
-Implicit conversions can also be controlled with the CMake option `JSON_ImplicitConversions` (`ON` by default) which
-sets `JSON_USE_IMPLICIT_CONVERSIONS` accordingly.
-
 ## Default definition
 
 By default, implicit conversions are enabled.
@@ -27,6 +24,12 @@ By default, implicit conversions are enabled.
     You can prepare existing code by already defining `JSON_USE_IMPLICIT_CONVERSIONS` to `0` and replace any implicit
     conversions with calls to [`get`](../basic_json/get.md).
 
+!!! hint "CMake option"
+
+    Implicit conversions can also be controlled with the CMake option
+    [`JSON_ImplicitConversions`](../../integration/cmake.md#json_legacydiscardedvaluecomparison)
+    (`ON` by default) which defines `JSON_USE_IMPLICIT_CONVERSIONS` accordingly.
+
 ## Examples
 
 ??? example