Merge a17t-redesign, kinda ts-ify setup.js

the web ui has been redesigned with the a17t toolkit, which imo looks a
lot better than bootstrap. This also brought a complete rework of the
web code, which now makes a lot more sense hopefully. the setup page is
still stuck with bootstrap, its not much of a priority but i'll rewrite
it eventually.

mail/generate.py

@@ -1,8 +1,13 @@
 import subprocess
 import shutil
 import os
+import argparse
 from pathlib import Path
 
+parser = argparse.ArgumentParser()
+parser.add_argument("-o", "--output", help="output directory for .html and .txt files")
+
+args = parser.parse_args()
 
 def runcmd(cmd):
     if os.name == "nt":
@@ -22,7 +27,8 @@ for mjml in [f for f in local_path.iterdir() if f.is_file() and "mjml" in f.suff
 
 html = [f for f in local_path.iterdir() if f.is_file() and "html" in f.suffix]
 
-output = local_path.parent / "data"
+output = Path(args.output)  # local_path.parent / "build" / "data"
+output.mkdir(parents=True, exist_ok=True)
 
 for f in html:
     shutil.copy(str(f), str(output / f.name))