chore: upgrade package, improve helm, workflows and docs

[evegufy]

Description

• npgsql: upgrade package R24.05 | Upgrade Npgsql package portal-backend#731
• dependabot: group version updates Dependabot | group version-updates portal#300
• docs: add links and legal notice TRG 2.03 repository structure #134 missing reference your Contribution guideline in general ReadMe #133
• dependencies-check: remove dash tool jar from repo: move to downloading the tool at every run
• helm chart: change ingress to work without tls enabled: I noticed that it isn't possible to enable it without TLS enabled as well: this is quite an annoyance if one wants to use the chart in a local testing setup due to this validation being place which is taking effect if the default values aren't commented out.

Checklist

• I have followed the contributing guidelines
• I have performed a self-review of my own changes

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud