External projects moderator database (#5692)

* Begin external projects moderator database frontend

* add copy link button

* begin project page permissions settings

* MEL database backend routes

* include filename in external files

* Hook up frontend external license page to backend

* more work on user-facing external projects stuff

* put user-facing stuff behind feature flag

* prepr

* clippy

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Co-authored-by: aecsocket <aecsocket@tutanota.com>

packages/assets/icons/binary.svg

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+<svg
+  class="lucide lucide-binary"
+  xmlns="http://www.w3.org/2000/svg"
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+  height="24"
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packages/assets/icons/signature.svg

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+<!-- @license lucide-static v0.562.0 - ISC -->
+<svg
+  class="lucide lucide-signature"
+  xmlns="http://www.w3.org/2000/svg"
+  width="24"
+  height="24"
+  viewBox="0 0 24 24"
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+>
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+</svg>