Support basic cloud native buildpack for the kyma alpha app push command

[pPrecel]

Description

Changes proposed in this pull request:

• support building simple applications from source code

Changes in the binary size:

• from main - 68MiB
• from branch - 84MiB

How to use this feature:

1. create dir /tmp/sources and put following files in it:

/tmp/sources/main.go:

package main

import (
    "fmt"
    "net/http"
    "os"
)

func main() {
    mux := &http.ServeMux{}
    mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
  	  fmt.Println("got request")
  	  w.WriteHeader(200)
  	  w.Write([]byte("oky doky"))
    })
    if err := http.ListenAndServe(":8080", mux); err != nil {
  	  fmt.Println(err.Error())
  	  os.Exit(1)
    }
}

/tmp/sources/go.mod:

module github.com/kyma-project/pack-test

go 1.23.2

2. run the feature by using the following command:

go run main.go alpha app push --name test-app --app-path /tmp/sources --container-port 8080 --expose

Related issue(s)

• POC: prove thatkyma app push could use basic cloud native buildpack  #2262