feat(cli): updated bal graph to human readable tree output

[tanbirali]

Purpose

The bal graph command outputs a digraph. This is not directly readable from the CLI and the users have to use a digraph visualizer to view the dependency graph.

Fixes #42866

Approach

A new class, CreateDependencyTreeTask, was created. This new task is responsible for accessing the project's resolved dependency graph, traversing it using a recursive method. Finally, the GraphCommand execution pipeline was updated to swap the old digraph task with the new dependency tree task.

Samples

Provide high-level details about the samples related to this feature.

Remarks

List any other known issues, related PRs, TODO items, or any other notes related to the PR.

Check List

• Read the Contributing Guide
• Updated Change Log
• Checked Tooling Support (#)
• Added necessary tests
  • Unit Tests
  • Spec Conformance Tests
  • Integration Tests
  • Ballerina By Example Tests
• Increased Test Coverage
• Added necessary documentation
  • API documentation
  • Module documentation in Module.md files
  • Ballerina By Examples

[azinneera]

@tanbirali, there are compilation errors. Could you please check and fix them?