Skip `resource` module's attributes not available on the current system

Handle multiline GITHUB_OUTPUT in draft-release GH Action

README edits

Refactor on_daemon_log()

Refactor clipboard classes

Rename callf() to proc_run()

Do not open quoted message's attachments on enter keypress

Create parent dirs if necessary before writing history or logs

Use pathlib.Path instead of some os.path functions

Remove signal-cli legacy dirs

Improve :attach, allow multiple files

Refactor parse_args() defaults

Check for errors when opening a file in exetrnal editor

Add key bindings and commands help to HelpDialog widget

Shadow widget rework