Custom packages: set minimum version and automatic install

[noahtalerman]

Goal

User story
As an IT admin,
I want to set a minimum version and automatically install custom package
so that I can deploy an app to all my workstations w/o having to write a policy.

Context

• Product designer: @marko-lisica

Higher-level objective: Auto-reinstall productivity apps when they’re out of date

Changes

Product

• Reference documentation changes: Docs changes covered by API changes below.
• UI changes: Figma link
• CLI (fleetctl) usage changes: No fleetctl changes.
• YAML changes: No YAML changes.
• REST API changes: API design: Custom packages: set minimum version and automatic install #22477
• Fleet's agent (fleetd) changes: No fleetd changes.
• Activity changes: No activity changes.
• Permissions changes: No permissions changes. Software add/edit/remove permissions are already specified in the permissions guide.
• Changes to paid features or tiers: Available for Fleet Premium.

Engineering

• Feature guide changes: TODO
• Database schema migrations: TODO
• Load testing: TODO

ℹ️  Please read this issue carefully and understand it. Pay special attention to UI wireframes, especially "dev notes".

QA

Risk assessment

• Requires load testing: TODO
• Risk level: Low / High TODO
• Risk description: TODO

Manual testing steps

1. Step 1
2. Step 2
3. Step 3

Testing notes

Confirmation

1. Engineer (@____): Added comment to user story confirming successful completion of QA.
2. QA (@____): Added comment to user story confirming successful completion of QA.

[noahtalerman]

Hey @marko-lisica I think let's set this user story aside. I think we're already at mission critical app management parity for custom packages.

But please keep the wireframes b/c we might come back to these workflows when we get feedback from customers who use the policy automations feature.

[noahtalerman]

Hey @zayhanlon heads up that we set this user story aside and pulled it out of the current design sprint.

We realized that Fleet is already at mission critical app management parity for custom apps/packages.

Other MDM solutions ask the IT admin to write a custom policy (w/ a script instead of osquery query) to trigger custom app install.

Fleet already supports this workflow using the install software policy automation. Guide is here.

Triggering Fleet-maintained app installs w/o writing a custom policy is a mission critical app management workflow. There's a user story for that in the current design sprint here: #22077