Add GitHub Workflows

[HilkopterBob]

Workflows we need:
on merge to devel (or) other Branch:

• lint
• unit tests
• Test Build

on merge to main:

• all the above and:
• docker ct integration test (use private repo)

on release:

• build & publish new docker container with stable-VX.X.X tag
• build & add to release binary compiled file with -stable-VX.X.X tag

[Kartoffel096]

Workflows currently Done:
on merge to devel (or) other Branch:

• lint REF: 29e7b7a
• unit tests REF: d13b480
• Test Build REF: ef5a08a

on merge to main:

• all the above and:
• docker ct integration test (use private repo)

on release:

• build & publish new docker container with stable-VX.X.X tag
• build & add to release binary compiled file with -stable-VX.X.X tag REF: fbb3085

[HilkopterBob]

updates? @Kartoffel096

[Kartoffel096]

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