add github source

[severo]

see #327

[Copilot]

Pull request overview

Adds a new GitHub-backed Source implementation so the app can parse GitHub URLs and navigate repositories (directories/files) similarly to existing Hugging Face / HTTP sources.

Changes:

• Introduces src/lib/sources/gitHubSource.ts with URL parsing, breadcrumb/sourceParts generation, directory listing via GitHub Contents API, and branch listing via GitHub Branches API.
• Wires GitHub source detection into the app’s source resolution chain.
• Adds a Vitest suite covering parseGitHubUrl and getGitHubSource().sourceParts.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 5 comments.

File	Description
src/lib/sources/gitHubSource.ts	Implements GitHub URL parsing + Source behaviors (list files, resolve URL, versions).
src/lib/sources/index.ts	Exports getGitHubSource from the sources module.
src/components/App/App.tsx	Adds GitHub to the source detection chain.
test/lib/sources/gitHubSource.test.ts	Adds tests for parsing and breadcrumb/sourceParts generation.

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[Copilot]

Pull request overview

Adds first-class GitHub URL support to the app’s “sources” system, enabling parsing GitHub repo/tree/blob/raw URLs, listing directory contents via the GitHub API, and integrating this new source type into the main source-resolution flow (per #327).

Changes:

• Introduce gitHubSource with URL parsing, directory listing (GitHub Contents API), and branch listing.
• Wire getGitHubSource into the app’s source selection chain and export it from the sources index.
• Add unit tests for GitHub URL parsing and breadcrumb/source-part generation.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
src/lib/sources/gitHubSource.ts	New GitHub source implementation (parse URLs, list files, list branches, build breadcrumbs).
src/components/App/App.tsx	Uses getGitHubSource() during source detection.
src/lib/sources/index.ts	Exports getGitHubSource from the sources module.
test/lib/sources/gitHubSource.test.ts	Adds coverage for GitHub URL parsing and getGitHubSource().sourceParts.

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[Copilot]

Pull request overview

This PR adds GitHub as a first-class data source option (URL parsing, breadcrumb generation, and directory listing via the GitHub API) and removes the prefix field from DirSource, updating UI/test code accordingly.

Changes:

• Introduces getGitHubSource() + parseGitHubUrl() (including breadcrumb/sourceParts behavior) and adds unit tests for URL parsing/sourceParts.
• Removes DirSource.prefix and updates existing sources/components/tests to rely on sourceId/sourceParts instead.
• Updates the Folder UI navigation to route using file.sourceId (via routes config) rather than joining with a directory prefix.

Reviewed changes

Copilot reviewed 10 out of 10 changed files in this pull request and generated 5 comments.

Show a summary per file

File	Description
test/lib/sources/gitHubSource.test.ts	Adds tests for GitHub URL parsing and sourceParts generation.
src/lib/sources/types.ts	Removes prefix from DirSource interface.
src/lib/sources/index.ts	Exports getGitHubSource.
src/lib/sources/hyperparamSource.ts	Drops prefix from returned DirSource object.
src/lib/sources/huggingFaceSource.ts	Removes now-unused prefix logic from HF directory source.
src/lib/sources/httpSource.ts	Drops prefix from returned DirSource object.
src/lib/sources/gitHubSource.ts	Adds GitHub source implementation (parsing, listFiles via API, branches/versions).
src/components/Folder/Folder.tsx	Switches folder navigation logic from prefix-join to file.sourceId routing.
src/components/Folder/Folder.test.tsx	Updates tests to match DirSource interface change (no prefix).
src/components/App/App.tsx	Wires GitHub source into source detection chain.

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[platypii]

cool!