Add README.md

Signed-off-by: TheTechRobo <thetechrobo@protonmail.ch>

README.md

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+# intern
+### an `ia upload` frontend
+
+## What is it?
+
+Example command:
+
+`intern wiki-raininghain.fandom.com "raininghain.fandom.com wikidump" wiki rainingchainfandomcom-20220429-wikidump/ -i="-v"`
+
+outputs:
+
+`ia upload wiki-raininghain.fandom.com rainingchainfandomcom-20220429-wikidump/ --metadata "mediatype:texts" --metadata "title:raininghain.fandom.com wikidump" --metadata "subject:MediaWiki; wiki; wikiteam" -v`
+
+## Why?
+
+I never put metadata in archive.org items. I'm both too lazy and I forget.
+
+intern helps with that.
+
+First, it forces you to add a page title in addition to the identifier, which makes items more human-usable.
+
+Secondly, it has a few presets. The current presets and their effects are:
+
+* web:
+    * `mediatype`: `web`
+* text:
+    * `mediatype`: `texts`
+* wiki:
+    * `mediatype`: `texts`
+    * `subject`: `MediaWiki; wiki; wikiteam`
+* none:
+
+Picking a type is required, but if you don't want anything choose `none`. Metadata of presets can be overwritten using the usual --metadata flag.
+
+Passing options (such as `-v`) to ia can be done with the `-i` flag.  
+However, you might need to do e.g. `-i=-v` rather than `-i -v` because I'm too lazy to do the one-line fix.
+
+--metadata does not have to be used with `-i` and is not tested that way.
+
+### comments
+
+If you have questions, comments, or fixes, file an Issue or Pull Request! :-)