Feature/log section processor

[bomoko]

This PR introduces a new way of Parsing and displaying the build logs, it introduces sections that, in combination with the changes in uselagoon/build-deploy-tool#98 will make the build logs easier to navigate.

It splits the build log where it finds a section header of the form

/##############################################\n(BEGIN) (.+)\n##############################################/;

and uses whatever is in the section capture group as the section heading. Anything falling between the section heading and the next section heading is considered to be the log text for that section.

We fall back to displaying the entire log in a single section if there are no sections found.

Below is an example of the output

Checklist

• Affected Issues have been mentioned in the Closing issues section
• Documentation has been written/updated
• PR title is ready for inclusion in changelog

Explain the details for making this change. What existing problem does the pull request solve?

[tobybellwood]

transferred to uselagoon/lagoon-ui#23