puller: adds puller scaffolding

[chris-ramon]

Details

• main: wires puller params to main.
• puller: adds implementation clone step.
• go.mod: adds github.com/go-git/go-git/v5 lib.
• .gitignore: adds .gitignore file.
• bin: adds main entry point script.
• go.mod: adds github.com/google/go-github lib.
• main: adds puller pkg.
• puller: adds github client wiring.
• puller: adds puller scaffolding.

Test Plan

✔️ Tested that puller works as expected:

$ ./bin/start.sh
(•) https://github.com/graphql-go/graphql

(press q to quit)

---
You chose https://github.com/graphql-go/graphql!
Enumerating objects: 5158, done.
Counting objects: 100% (96/96), done.
Compressing objects: 100% (58/58), done.
Total 5158 (delta 52), reused 52 (delta 34), pack-reused 5062 (from 3)
2025/02/07 14:39:34 result: &{}

[chris-ramon]

LGTM 👍