Update usage message for install command

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Add flags for Prometheus, EULA and clusterName

These flags add common options for end-users. Kasten team to
advise on further flags required/desired.

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Add devspace, tilt, autok3s and k3s as downloads

Closes: alexellis#521

Signed-off-by: Henning Schroeder <[email protected]>
Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

feat: add kubescape support

Signed-off-by: Batuhan Apaydın <[email protected]>

Update tests for dynamic version apps

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Update README / docs for arkade get with @ symbol

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Bump golang.org/x/mod from 0.4.2 to 0.5.0

Bumps [golang.org/x/mod](https://github.com/golang/mod) from 0.4.2 to 0.5.0.
- [Release notes](https://github.com/golang/mod/releases)
- [Commits](golang/mod@v0.4.2...v0.5.0)

---
updated-dependencies:
- dependency-name: golang.org/x/mod
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Add command to generate markdown table for apps

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

Add documentation updates to PR template

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <[email protected]>

cosign: update tool to use release 1.0.0

Signed-off-by: Carlos Panato <[email protected]>