feat: Add script to build with the latest git tag and commit

scripts/build.sh

+#!/bin/bash
+#
+# Builds GoShimmer with the latest git tag and commit hash (short)
+# E.g.: ./goshimmer -v --> GoShimmer 0.3.0-f3b76ae4
+
+latest_tag=$(git describe --tags $(git rev-list --tags --max-count=1))
+commit_hash=$(git rev-parse --short HEAD)
+
+go build -ldflags="-s -w -X github.com/iotaledger/goshimmer/plugins/banner.AppVersion=${latest_tag:1}-$commit_hash"