[FEATURE] Support .endgit config file for per-repo settings

[0xliam627]

Description

Currently when a user enables a repo on EndGit, there's no way for them to customize repo configuration directly from their repository. We should support a .endgit (or .endgit.yml) file at the repo root so users can configure display and behavior settings on EndGit.

Proposed config fields

• branch: Branch EndGit tracks (instead of always using main/master)
• icon: Icon/avatar displayed for the repo on the dashboard
• name: Custom display name (overrides original repo name)
• description: Short description for the repo
• visibility: Public or private on the marketplace
• build: Custom build/deploy configuration

Example .endgit.yml

name: "My Awesome Plugin"
icon: "https://example.com/icon.png"
branch: ["develop", "main"]
description: "A cool Endstone plugin"
visibility: public

Tasks

• Define schema for .endgit / .endgit.yml file
• Implement logic to read and parse config file from user's repo
• Merge file config with dashboard settings (decide priority order)
• Validate config values
• Update docs with usage guide

Notes

• Need to decide format: YAML, JSON, or TOML
• Need to decide priority when dashboard config conflicts with .endgit file