Add Sonatype Nexus repository integration module

[matifali]

Create a Coder module that pre-configures Nexus repository access for workspaces. Should accept API token as parameter and configure Maven/npm/Docker registry settings automatically.

Related coder/coder#12516

[krushnarout]

/attempt #202

[krushnarout]

@matifali Can I be assigned to this issue? I’ve asked in Discord.

[matifali]

/bounty 150