Add the get.flox.dev install script to the install options

[djsauble]

What

Adds the web-hosted install script (curl -fsSL https://get.flox.dev | sh) to the documented install options.

Draft — do not merge yet. This PR previews the user-facing experience for the install-script spec review (DEV-146). It should land only once get.flox.dev is live and serving the script.

Stacked on #61 (Nix/MacOS tab consolidation, split out per spec review). This PR's base is daniel/consolidate-install-tabs so the preview shows the consolidated tabs and the #nix anchor the script links to; GitHub retargets it to main automatically once #61 merges.

Changes

• install-flox/install.mdx — new Install Script tab: the one-line command, how the script chooses an install method, a verified sample transcript (Ubuntu), the existing-Nix behavior (per spec review the script never installs through Nix — it stops and links to the Nix tab, and flox-installers#499 was updated to match), the sudo-preview behavior, refused systems, and FLOX_CHANNEL / FLOX_VERSION pinning.
• install-flox/uninstall.mdx and the mirrored uninstaller block in install-flox/troubleshooting.mdx — matching Install Script tab that routes to the package-manager tabs.
• install-flox/troubleshooting.mdx — "Reporting issues" now lists the install script as an install method.
• index.mdx — the Get Started card leads with the one-line install.
• tutorials/installing-from-repo.mdx — intro note mentions the script as an automation alternative.

The sample transcripts were derived line-by-line from the shipped install.sh (flox-installers repo, feature/flox-install-sh), and every embedded version string uses a form the daily update-flox-version.yml sed rewrite matches, so the transcripts won't go stale.

Spec review follow-ups (2026-08-05)

• Nix/MacOS tab consolidation split out to Consolidate the Nix and MacOS install tabs #61; this PR rebased on top.
• Script no longer installs through Nix — docs and flox-installers#499 updated, flox-installers#505 closed.
• Linear triage issue filed with the CLI team for install-script analytics.

Open questions for spec review

1. Tab placement/name — this draft makes "Install Script" the first (default) tab, on the theory that the one-liner is the headline convenience method (mise/uv-style). Happy to move it after RPM if we'd rather not change the default.
2. Checksums note — the page-top checksums <Note> doesn't apply cleanly to the script flow (the script verifies nothing itself on the deb path beyond apt; rpm imports the signing key). Left unchanged here; worth a follow-up.
3. imageless-kubernetes/install/self-managed.mdx mentions only rpm/deb availability; optionally reword once the script is live.

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Project	Status	Preview	Updated (UTC)
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[djsauble]

Some feedback from spec review today:

1. All of the Nix install tabs (generic, NixOS, determinate) should be consolidated into one (unrelated to this PR so it could be a separate PR). This will help keep the tabs from scrolling horizontally. I think the two macOS tabs (Pkg, Homebrew) could be consolidated in the same way, again it's unrelated to this install.sh PR, so I'd add these changes as a separate commit to the Nix tabs consolidation PR).

2. The install.sh script should not attempt to install Flox with Nix. Let's cut that from the script itself (https://github.com/flox/flox-installers/pull/499) and also close the other PR that attempts to handle Determinate Nix gracefully (https://github.com/flox/flox-installers/pull/505). The script should just detect if Nix is already installed, and if so, provide a link to the (soon-to-be-consolidated) Nix tab on the Install Flox page (https://flox-daniel-install-script-get-flox-dev.mintlify.site/install-flox/install#nix).

3. Open a new Linear triage issue in the CLI team to add analytics to the install.sh script (so that we can see what the script attempted to do, and if it failed to install Flox, why that was).