Make proposal for application entry point

[jonmeow]

There's still no name for the application entry point (main in C++). This was raised in #1869 and the leads asked for a proposal that evaluates trade-offs to review (note some of these trade-offs are discussed on the issue). This issue is to track the need for a proposal on the topic.

[github-actions[bot]]

We triage inactive PRs and issues in order to make it easier to find active work. If this issue should remain active or becomes active again, please comment or remove the inactive label. The long term label can also be added for issues which are expected to take time. This issue is labeled inactive because the last activity was over 90 days ago.

[jonmeow]

@acpoppe has proposal #2265 for this.

[github-actions[bot]]

We triage inactive PRs and issues in order to make it easier to find active work. If this issue should remain active or becomes active again, please comment or remove the inactive label. The long term label can also be added for issues which are expected to take time. \n\n\n This issue is labeled inactive because the last activity was over 90 days ago.