Fix workflow issue where latest version was not found

Update to use latest action tags

Fixes issue while checking out subdirectory within default branch.

Update readme

Fixes possible git-checkout ambiguity.

Adds permissions lines to workflow samples

refresh-release.sh: improves tag state report.

Adds prerelease support to the Release Refresh workflow.

Adds workflow to bump version tags on release.

Updates README to reflect the 'latest' default tag change.

Adjusts pulled .NET version from 5 to 6.

Adapts examples to '@v2'.

Adds tags to all yml samples' 'uses:' occurrences.

Adds LICENSE file with Apache 2.0 license.

Wipes working directory only if exists.