Add CI scripts for builds.sr.ht

This patch adds three CI scripts:
- archlinux builds dialog-rs on Arch with the latest rustc version.
- debian builds dialog-rs on Debian Stable with an older rustc version.
- lint checks the formatting, REUSE compliance and clippy warnings.

These scripts are executed on each push.  If a script fails, the
committer will receive a mail.  If a script fails on the master branch,
a mail is sent to the mailing list instead.  The builds are also listed
in the web interface at:
	https://builds.sr.ht/~ireas/dialog-rs

0 files changed, 0 insertions, 0 deletions