TPA-RFC-73: Add template boilerplate (team#41721)

Summary: Tails infra merge roadmap.

# Background

In 2023, Tor and Tails started discussing the possibility of a merge and, in

that case, how the future of the two infrastructures would look like. The

organizational merge happened in July 2024 with a [rough

idea](/tpo/tpa/team/-/wikis/roadmap/tails-merge) of the several components that

would have to be taken care of and the clarity that merging infrastructures

would be a several-years plan. This document intends to build on the work

previously done and describe dependencies, milestones and a detailed timeline

containing all services to serve as a basis for future work.

# Proposal

## Goals

### Must have

- A list of all services with:

  - a description of the service and who are the stakehoders

  - the action to take

  - the complexity

  - a list of dependencies or blocks

  - a time estimation

- A plan to merge the Puppet codebases and servers

- A list of milestones with time estimates and and indication of ordering

### Non-Goals

- We don't aim to say exactly who will work on what and when

## Scope

This proposal is about:

- all services that the Tails Sysadmins currently maintain: each of these will

  either be kept, retired, merged with or migrated to existing TPA services

  (see the [terminology](#actions) below), depending on several factors such as

  convenience, functionality, security, etc.

- some services maintained by TPA that may act as a source or target of a

  merge, or migration.

## Terminology

### Actions

    class Website merge

```

# Alternatives considered

- **Converge both codebases before merging repositories and Puppet Servers:**

  This approach would have the following disadvantages:

  - keeping two different Puppet codebase repositories in sync is more prone to

    errors and regressions,

  - no possibility of using exported resources would make some migrations more

    difficult (eg. Backups, Monitoring, TLS, etc)

# References

See the [TPA/Tails sysadmins overview][] document that was used to inform the