Add base_path setting to atmos config

[aknysh]

what

• Add base_path setting to atmos config
• Add atmos logos
• Update README

why

• Provide/configure a base path for all components and stacks
• Allow controlling stacks and components paths using only one setting or ENV var
• Can also be set using ATMOS_BASE_PATH ENV var, or --base-path command-line argument
• Supports both absolute and relative paths
• If not provided or is an empty string, components.terraform.base_path, components.helmfile.base_path and stacks.base_pathare independent settings (supporting both absolute and relative paths)
• If base_path is provided (via ENV var or command-line arg), components.terraform.base_path, components.helmfile.base_path and stacks.base_path are considered paths relative to base_path

test

ATMOS_BASE_PATH=./examples/complete atmos terraform apply test/test-component -s=tenant1-ue2-dev

Found ENV var ATMOS_BASE_PATH=./examples/complete

Variables for the component 'test/test-component' in the stack 'tenant1/ue2/dev':

enabled: true
environment: ue2
namespace: eg
region: us-east-2
service_1_name: service-1
service_2_name: service-2
stage: dev
tenant: tenant1

Writing variables to file:
examples/complete/components/terraform/test/test-component/tenant1-ue2-dev-test-component.terraform.tfvars.json

[nitrocode]

Is this new atmos logo in creative commons ?

[nitrocode]

Does this close PR #96 ?

[aknysh]

Does this close PR #96 ?

No, it's a diff thing (providing paths to the code via inputs, not reading them from atmos.yaml)