Improving Documentation: Fixing Name Convetions and Formatting

[gabryon99]

This pull-request fixes naming conventions for technologies (and non). E.g.,

• kotlin $\to$ Kotlin
• gradle $\to$ Gradle
• jvm $\to$ JVM
• Jetbrains $\to$ JetBrains

In addition, the PR changes the monospaced font for code blocks to JetBrains Mono.