Removing limits on containers, improving repo search

[hunvreus]

By default, containers are now able to use as much resources (CPU and memory) as they want. You can limit them by adding DEFAULT_CPUS and/or DEFAULT_MEMORY_MB. Additionally, you can let users customize the values if you provide MAX_CPUS and/or MAX_MEMORY_MB (a new "Resources" will appear in the project's settings tab).

I've made a few additional fixes, including for the repo selection when creating or editing a project. If the GitHub App is only installed on selected repositories, we only show these.

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This discussion was created from the release Removing limits on containers, improving repo search.