Add the `ssh-command`, `ssh-address` and `web-url` outputs

These outputs come in handy when starting this Action in detached mode
and, say, reporting the SSH address via a Slack message.

Merge pull request #223 from mxschmitt/verify-detached/action.yml-in-…

…pr-builds

ci: verify that the `action.yml` files are in sync

Add the convenience Action `mxschmitt/action-tmate/detached`

This convenience Action merely switches the default value of the
`detached` setting to `true`.

Add support for `msys2-location`

This allows specifying a different MSYS2 location than `C:\msys64` to
use when calling `pacman` to install `tmate`.

Merge pull request #205 from lpottier/master

Adding support for RHEL-based distributions

Merge pull request #189 from dave-gray101/feat-connect-timeout

Feat: Connect Timeout

chore: bump dependencices (#172)

* - `@actions/tool-cache` v2.0.0 should not have any relevant breaking changes for us:
  - https://github.com/actions/toolkit/blob/main/packages/tool-cache/RELEASES.md
- `@octokit/rest` v19/v20 should also not affect us:
  - https://github.com/octokit/rest.js/releases/tag/v19.0.0
  - https://github.com/octokit/rest.js/releases/tag/v20.0.0
  - Except: https://github.com/octokit/octokit.js/#fetch-missing

Fixes #170

* chore: use Node.js 20 instead
node18 is LTS as of today, but not supported in GitHub Actions, so using node20 instead as per actions/runner#2619 (comment).

Merge pull request #162 from dscho/detached-mode

Add support for a "detached" mode

Merge pull request #153 from dscho/limit-access-to-actor-auto

Default to using public key authentication (if any public SSH key is registered)

Add support for using action with Github Enterprise server (#148)

Co-authored-by: Johannes Schindelin <johannes.schindelin@gmx.de>