update: first mapping tutorial revamp (#4708)

Author: danil-pavlov

docs/topics/native/apple-framework.md

@@ -24,9 +24,9 @@ In this tutorial, you will:
 * [Use the framework from Swift](#use-code-from-swift)
 
 You can use the command line to generate a Kotlin framework, either directly or with a script file (such as `.sh` or `.bat` file).
-However, this approach doesn't scale well for big projects that have hundreds of files and libraries.
+However, this approach doesn't scale well for larger projects that have hundreds of files and libraries.
 Using a build system simplifies the process by downloading and caching the Kotlin/Native
-compiler binaries and libraries with transitive dependencies and run the compiler and tests.
+compiler binaries and libraries with transitive dependencies, as well as by running the compiler and tests.
 Kotlin/Native can use the [Gradle](https://gradle.org) build system through the [Kotlin Multiplatform plugin](gradle-configure-project.md#targeting-multiple-platforms).
 
 > If you use a Mac and want to create and run applications for iOS or other Apple targets, you also need to

docs/topics/native/mapping-function-pointers-from-c.md

@@ -1,5 +1,14 @@
 [//]: # (title: Mapping function pointers from C – tutorial)
 
+<tldr>
+    <p>This is the third part of the <strong>Mapping Kotlin and C</strong> tutorial series.</p>
+    <p><img src="icon-1-done.svg" width="20" alt="First step"/> <a href="mapping-primitive-data-types-from-c.md">Mapping primitive data types from C</a><br/>
+        <img src="icon-2-done.svg" width="20" alt="Second step"/> <a href="mapping-struct-union-types-from-c.md">Mapping struct and union types from C</a><br/>
+        <img src="icon-3.svg" width="20" alt="Third step"/> <strong>Mapping function pointers</strong><br/>
+        <img src="icon-4-todo.svg" width="20" alt="Fourth step"/> <a href="mapping-strings-from-c.md">Mapping strings from C</a><br/>
+    </p>
+</tldr>
+
 > The C libraries import is [Experimental](components-stability.md#stability-levels-explained).
 > All Kotlin declarations generated by the `cinterop` tool from C libraries
 > should have the `@ExperimentalForeignApi` annotation.
@@ -9,12 +18,8 @@
 >
 {style="warning"}
 
-This is the third post in the series. The very first tutorial is
-[Mapping primitive data types from C](mapping-primitive-data-types-from-c.md). There are also
-[Mapping struct and union types from C](mapping-struct-union-types-from-c.md) and 
-[Mapping strings from C](mapping-strings-from-c.md) tutorials.
+In this tutorial, you'll learn how to:
 
-In this tutorial We will learn how to:
 - [Pass Kotlin function as C function pointer](#pass-kotlin-function-as-c-function-pointer)
 - [Use C function pointer from Kotlin](#use-the-c-function-pointer-from-kotlin)
 
@@ -259,13 +264,12 @@ fun main() {
 }
 ```
 
-## Next Steps
+## Next step
+
+In the next part of the series, you'll learn how strings are mapped between Kotlin and C:
+
+**[Proceed to the next part](mapping-strings-from-c.md)**
 
-Continue exploring more C language types and their representation in Kotlin/Native
-in next tutorials:
-- [Mapping primitive data types from C](mapping-primitive-data-types-from-c.md)
-- [Mapping struct and union types from C](mapping-struct-union-types-from-c.md)
-- [Mapping strings from C](mapping-strings-from-c.md)
+### See also
 
-The [C Interop documentation](native-c-interop.md)
- covers more advanced scenarios of the interop.
+Learn more in the [Interoperability with C](native-c-interop.md) documentation that covers more advanced scenarios.