Pre-register plugins inside docker container (#9533)

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# Description
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Plugins bundled with nushell will be kept inside docker container and
preregistered
# User-Facing Changes
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helps us keep track of breaking changes. -->

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docker/Dockerfile

@@ -20,9 +20,11 @@ RUN echo '/usr/bin/nu' >> /etc/shells \
     |xargs -I{} wget {} \
     && tar -xzf nu* \
     && cd nu*-musl \
-    && mv nu /usr/bin/nu \
+    && mv nu* /usr/bin \
     && chmod +x /usr/bin/nu \
     && chown -R nushell:nushell /home/nushell/.config/nushell \
+    && ls /usr/bin/nu_plugin* \
+    |xargs -I{} su -c 'register {}' nushell \
     && rm -rf /tmp/*
 
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