Algernon 1.17.4

• Fix a missing m character when drawing the banner/logo at start.
• Also show the banner/logo at start on Windows.
• Add HTML sanitization of the filename for the "file not found" page". This fixes an XSS issue.
• Switch from vt100 to the vt package.
• Update go.mod, ref #159.
• Update CI configuration.
• Remove FUNDING.yml.
• Update documentation.
• Update dependencies.