Should tackle #14026.
This will run a daily Github action and create a PR if there's a new
update in our TUF on `edge` or `stable`.
E.g. somebody releases 1.22.0 fleetd to `stable` on our TUF and the next
day this automation runs and will create a PR that updates the versions
in `orbit/TUF.md` (or they can run the workflow manually).
Am happy to amend the shape of `orbit/TUF.md` (or we can iterate later).
Motivation: I often find myself digging through the XML in https://tuf.fleetctl.com to see if/when/what packages have been published in the different release channels, this tool aims to make the process less painful.
```
~/fleet $ go run tools/tuf/status/status.go --help
This is a CLI utility to fetch and filter the entries posted by a TUF repository.
-key-filter string
filter keys using a regular expression (default "stable")
-url string
URL of the TUF repository (default "https://tuf.fleetctl.com")
```
### Examples
- To filter all items on the edge channel use `--key-filter="edge"`
- To filter all items on version `1.3` including patches that run on Linux use `--key-filter="linux/1.3.*"`
- To filter Fleet Desktop items on `1.3.*`, `stable` and `edge` that run on macOS use `--key-filter="desktop/*.*/macos/(1.3.*|stable|edge)"`
### Example output
```
~/fleet $ go run tools/tuf/status/status.go --key-filter="desktop/*.*/macos/(1.3.*|stable|edge)"
Results filtered by "desktop/*.*/macos/(1.3.*|stable|edge)" and sorted by version, platform and key.
VERSION PLATFORM KEY LAST MODIFIED SIZE ETAG
1.3 macos targets/desktop/macos/1.3/desktop.app.tar.gz 2022-10-20T00:42:58.000Z 28.4 MB "ceb7a975880db6ab9aea7907915406e3-4"
1.3.0 macos targets/desktop/macos/1.3.0/desktop.app.tar.gz 2022-10-20T00:42:58.000Z 28.4 MB "ceb7a975880db6ab9aea7907915406e3-4"
1.3.1 macos targets/desktop/macos/1.3.1/desktop.app.tar.gz 2022-10-21T20:28:24.000Z 28.5 MB "3c6641a0df00009f3f076bd6b4fbc748-4"
edge macos targets/desktop/macos/edge/desktop.app.tar.gz 2022-10-21T20:28:37.000Z 28.5 MB "3c6641a0df00009f3f076bd6b4fbc748-4"
stable macos targets/desktop/macos/stable/desktop.app.tar.gz 2022-10-20T00:43:06.000Z 28.4 MB "ceb7a975880db6ab9aea7907915406e3-4"
```
