refactor: use github rest api to fetch files

[zolamk]

Description

Use the github rest api to fetch pull request files

Closes #1077

reviewpad:summary

🤖 Generated by Copilot at 4e6390a

Refactor code to use github.CommitFile type instead of pbc.File type in various packages and plugins. This reduces complexity, dependencies, and type conversions, and improves consistency and code quality.

Code review and merge strategy

Ask: this pull request requires a code review before merge

How

🤖 Generated by Copilot at 4e6390a

• Replace the pbc.File type with the github.CommitFile type in the codehost package and its dependencies, to simplify the code and avoid unnecessary conversions (link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link, link)
• Change the getPullRequestPatch function in the codehost/github/target/pull_request_target.go file to accept and use a gh.GithubClient argument instead of a codehost.CodeHostClient argument, since the latter is no longer needed (link, link)
• Remove the unused import of the fmt package from the codehost/github/target/pull_request_target.go file (link)
• Change the filesPathCode function in the plugins/aladino/functions/filesPath.go file to check and dereference the commitFile.Repr.Filename pointer, since the github.CommitFile type uses a pointer to a string instead of a string (link)
• Use the mock package to mock HTTP requests to the GitHub API in the lang/aladino/env_test.go file, using the mock.MockBackendOption type and the mock.NewMockedHTTPClient function (link, link)
• Use the aladino.MockDefaultGithubClientWithFiles function to create a mocked GitHub client that returns custom github.CommitFile values in the lang/aladino/env_test.go and lang/aladino/mocks.go files (link, link, link, link, link)
• Remove the files and fileErr arguments from the aladino.GetDefaultCodeHostClient function in the lang/aladino/mocks.go file, since they are no longer needed (link)
• Remove the GetDefaultCodeHostClientWithFiles function from the lang/aladino/mocks.go file, since it is no longer needed (link)

[reviewpad[bot]]

Reviewpad Report

:warning: Warnings

• It looks like you modified both functions and actions. Is that intentional?

:information_source: Messages

• If you are adding or updating a built-in, please do not forget to update the docs
• If you have added a new function or action do not forget to include it in the built-in list!

[zolamk]

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[zolamk]

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