chore: support devcontainer development

[malandis]

We add a devcontainer and Dockerfile to do local develpoment in
IntelliJ. We also add a Makefile wtih the common dev targets.

To use in IntelliJ:

• Under services, add Docker
• Open the devcontainer.json in the project
• Right click the blue wireframe square in the gutter by the opening curly
  
  Select "Create container and mount sources..."; select IntelliJ IDEA.
• Wait for it to download IntelliJ, build, and launch
• Develop in the new remote container IDE
• Use settings sync to get settings aligned between the host IntelliJ and guest

[rishtigupta]

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