feat: Add support for publishing packages from GitHub organizations

[meiseayoung]

Summary

This PR adds support for publishing packages from GitHub organization repositories. Currently, VPM only allows users to publish packages from their personal GitHub accounts. This change enables users who are members of GitHub organizations to publish packages from organization repositories.

Problem

When a user (e.g., meiseayoung) is a member of a GitHub organization (e.g., v-hono) and wants to publish packages from organization repositories, they receive the error: "You must submit a package from your own account".

Solution

1. Fetch user's organizations during OAuth login - When a user logs in via GitHub OAuth, we now fetch their organization memberships using the GitHub API (/user/orgs)

2. Store organization memberships - Organizations are stored in a new UserOrganization table

3. Validate against organizations - When creating a package, the URL is validated against both the user's account AND their organizations

4. Use organization as package prefix - If the URL belongs to an organization, the package name uses the org name as prefix (e.g., v-hono.hono instead of meiseayoung.hono)

Changes

File	Description
src/entity/organization.v	New UserOrganization entity
src/repo/organization.v	Database operations for organizations
src/auth.v	Fetch user's organizations during OAuth login
src/usecase/package/packages.v	Support organization URLs and prefixes
src/package.v	Pass organization info to create function
src/usecase/package/packages_test.v	Unit tests
src/repo/organization_test.v	Unit tests

Database Migration

CREATE TABLE IF NOT EXISTS "UserOrganization" (
    id SERIAL PRIMARY KEY,
    user_id INTEGER NOT NULL,
    org_name VARCHAR(255) NOT NULL,
    created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
);

CREATE INDEX idx_user_org_user_id ON "UserOrganization" (user_id);

[JalonSolov]

If you run v git-fmt-hook install, it will install a pre-commit hook in your clone that will run v fmt -w on your files on every commit.

[meiseayoung]

If you run v git-fmt-hook install, it will install a pre-commit hook in your clone that will run v fmt -w on your files on every commit.

got it,thank you.