[examples] Craft simple quick-start apps in examples

[adnanrahic]

Craft simple quick-start apps with popular programming languages and configure OpenTelemetry with Tracetest to collect traces and run trace-based tests.

Host all code samples in examples folder in this repo.

Craft sample apps and add to examples folder:

• Node.js with OpenTelemetry Collector (JavaScript for the back end)
• Node.js with Jaeger
• Node.js with OpenSearch
• Node.js with Tempo
• Go
• Rust
• Python
• TypeScript (JavaScript for the front end)

[danielbdias]

Hey @adnanrahic , after thinking for a while, I believe that we can add more languages to think about: Ruby, Kotlin, and Elixir.

As I have experience building APIs in Ruby I can do it on: #2249

On Kotlin and Elixir, we can have further development later.

[adnanrahic]

Nice. We can add more programming languages.