Polish recommending Envs in Configure Python Env Tool

[DonJayamanne]

• If user has .venv or .conda we probably should select them
  Not done as we don't do this today in extension
• If user has local env such as poetry, or pyenv or the like we should we select those instead or recommend them instead.
  E.g. look at workspaceFolder in the env.
  Not done as we don't do this today in extension

Similarly we might have some local (project) specific envs already configured before using Python extension, should we detect those and recommend those instead

[karthiknadig]

If there is a workspace .venv it should get auto selected, provided user has not messed with the defaults.

As for .conda and other types, on first start we could improve this.