feat(devcontainer+docker): Add devcontainer and docker support

[amitds1997]

Closes #68 Closes #69

Using devpod CLI to power the process, we are going to provide docker and devcontainer support.

Following tasks should be completed to get this ready:

• [x] All operations are async
• [x] Telescope integration for all operations
• [x] Checkhealth for devpod binary
• [x] Add devpod version check before container-based launch
• [x] For image/container launch, neovim launches at WORKDIR, if set, else let it go to default
• [x] Add configuration options for: dotfiles_path, gpg-agent-forwarding
• [x] Support to run Neovim with any devpod workspace (this can help when you are deploying into say k8s pod)
• [x] Add tests for all new features
• [x] Automatically detect devcontainer project on directory change.

[amitds1997]

Time to add docs 🎉