feat: add basic devfile and vscode settings to the repo

[mkuznyetsov]

Signed-off-by: Mykhailo Kuznietsov [email protected]

Add basic Devfile structure and vscode extension settings It will be extended as more usage will occur

related issue: One of the previous DevTools Week Dogfooding sessions, where we were encouraged to create/update Devfiles for development

[nickboldt]

Can you link to the relevant GH action and/or JIRA that explains why we are adding these files? Please provide better pull request description -- "It will be extended as more usage will occure" is not very clear.