feat: support for codeberg host

[guibou]

Close #100

[Copilot]

Pull request overview

This PR adds support for Codeberg as a third Git hosting provider alongside GitHub and GitLab. The implementation follows the existing patterns for GitHub and GitLab integration, enabling the issue tracker checker to work with Codeberg repositories.

• Introduces CodebergKey type for authentication
• Adds Codeberg domain detection and API URL construction
• Implements command-line option for Codeberg API key

Reviewed changes

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

File	Description
src/Krank/Types.hs	Adds CodebergKey newtype and integrates it into KrankConfig
src/Krank/Checkers/IssueTracker.hs	Extends GitServer enum with Codeberg, implements domain mapping, API URL construction, authentication headers, and error handling
app/Main.hs	Adds command-line parser for --issuetracker-codebergkey option

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[Copilot]

Missing space after CodebergKey in the export list. For consistency with the other exports in the module (like GithubKey (..), GitlabKey (..)), there should be a space before the opening parenthesis.

Suggested change

	CodebergKey(..),
	CodebergKey (..),

[Copilot]

The comment "The codeberg host token" is inconsistent with the other token comments. The GitHub comment says "oAuth token" (line 63) and GitLab says "oAuth token" (line 65). For consistency, this should be "The codeberg oAuth token" to match the pattern.

Suggested change

	-- | The codeberg host token
	-- | The codeberg oAuth token

[Copilot]

The new Codeberg variant lacks test coverage. The test suite at tests/Test/Krank/Checkers/IssueTrackerSpec.hs contains comprehensive tests for GitHub and GitLab URL parsing (using giturlTests), but no tests are added for Codeberg. Consider adding test cases for Codeberg by calling giturlTests Codeberg in the spec to ensure the implementation works correctly.