feat(mojaloop/#2092): upgrade nodeJS version for core services

[mdebarros]

feat(mojaloop/#2092): upgrade nodeJS version for core services - mojaloop/project#2092

• standardised CI scripts, however, the test-integration CI job needed minor tweaks to work with the central-ledger's implementation
• updated docker-compose files to work correctly
• added wait-4-docker npm script
• fixed lint issues
• updated .nvmrc to latest LTS version
• added standard CI scripts/config to package.json: release, snapshot, standard-version, etc
• updated gitignore to include test/results and IGNORE patterns
• updated README with standard auto-release information
• Fixed imports
• Cleaned up Package.json
• Removed unnecessary dependencies
• Removed unnecessary files
• Re-factored some integration test wrapWithRetries functions to cater for the expected return value, this will mean that integration tests should be more consistent and be more resilient to time-processing issues.
• Added a slight bump to the wrapWithRetries test helper function's default params for retries, and timeout

Notes:

• 'get-port' dependency version is fixed to v5.1.1, this is because v9+ only supports ESM loaders and not CJS. This will need to be addressed in a future story.
• Helm chart mountPaths need to be updated from /opt/central-ledger to /opt/app as follows:

      volumeMounts:
      - mountPath: /opt/app/config
        name: <deployment-name>

BREAKING CHANGE: Major version bump for node v16 LTS support, re-structuring of project directories to align to core Mojaloop repositories and docker image now uses /opt/app instead of /opt/central-ledger which will impact config mounts.