The path to dockerfile should be fixed to where the `agentcore` command was run

[jesseturner21]

Description

Currently when i run agentcore create and then go through with creating a harness the path to Dockerfile checks from the project directory instead of the directory where I ran the agentcore create command

Use the same path to module from the add policy!

Steps to Reproduce

1. Run agentcore create in ./
2. then create a project
3. then start creating a harness
4. choose add a Dockerfile
5. put in anything as the path
6. It will error with the path from the context of the project not the directory i ran the agentcore command from

(26-05-06 13:14:03) <0> [~/workplace/cli/withagentcore/agentcore-cli/.github]
dev-dsk-ajesstur-1e-ab120cb5 % agentcore create

Expected Behavior

path working dir is here - /workplace/ajesstur/cli/withagentcore/agentcore-cli/.github/

Actual Behavior

path working dir is here - /workplace/ajesstur/cli/withagentcore/agentcore-cli/.github/harnesses/

CLI Version

No response

Operating System

macOS

Additional Context

No response