Update README.md

[sssoleileraaa]

Status

Closes #304

Description of Changes

• Updated references to the old securedrop-builder name (I can't even remember it, it's so old ;))
• Since the workstation release management docs were difficult to read and scattered, I did some consolidation work to move release-specific instructions to Consolidate and update workstation release management process securedrop-dev-docs#30, which should be reviewed in tandem with this PR.
• Removed outdated Python build instructions and generalized how to use our build tool

Checklist

• Only bookworm tests are failing (see Update apt LFS repo names #413 (comment))
• Consolidate and update workstation release management process securedrop-dev-docs#30 has been merged
• Link in the readme works (https://developers.securedrop.org/en/latest/workstation_release_management.html#how-to-create-the-dispvm-for-building-packages)
• visual inspection

[gonzalo-bulnes]

The changes so far are looking great!

[sssoleileraaa]

@gonzalo-bulnes - I spent some time separating release management from generic instructions on how to use this tool. So this PR should be reviewed in tandem with an incoming securedrop-dev-docs PR (it'll be in draft because I'll need to edit it for formatting and style still).

[sssoleileraaa]

TODO: Once freedomofpress/securedrop-dev-docs#30 is merged, link to the section on how to build a dispVM rather than duplicating the instructions here, see https://github.com/freedomofpress/securedrop-dev-docs/pull/30/files#r1035458154

[sssoleileraaa]

[Blocked on https://github.com/freedomofpress/infrastructure/pull/4068 + tandem PR for securedrop repos + actually renaming the repos]

---

UPDATE: this is done

[sssoleileraaa]

@gonzalo-bulnes, if you end up merging freedomofpress/securedrop-dev-docs#30, this is the next PR to review, which references a section added in freedomofpress/securedrop-dev-docs#30 (see checklist in the PR description).

[gonzalo-bulnes]

Is putting the badge above the main header intentional? (I notice it doesn't show up in the preview.)

[sssoleileraaa]

:/ I see it still when I "view file": https://github.com/freedomofpress/securedrop-builder/blob/1f5feba3f9176b17e16084bb7c0877dcd98560bc/README

The badge is intentionally there and this PR shouldn't remove it.

[gonzalo-bulnes]

Only waiting for freedomofpress/securedrop-dev-docs#30 🙂

[gonzalo-bulnes]

@creviera I see only Bookworm jobs are failing in CI, and FWIW I wouldn't block this PR on them.

[sssoleileraaa]

@gonzalo-bulnes, while addressing your reviews, I noticed another opportunity to further consolidate our documentation. For deployment, the readme now points to the docs in freedomofpress/securedrop-dev-docs#30, so you'll notice that last commit that I pushed is mostly just deleting stuff: ba2c611

[gonzalo-bulnes]

• Only bookworm tests are failing (see Update apt LFS repo names #413 (comment))
• Consolidate and update workstation release management process securedrop-dev-docs#30 has been merged
• Link in the readme works (https://developers.securedrop.org/en/latest/workstation_release_management.html#how-to-create-the-dispvm-for-building-packages)
• visual inspection