feat: plugin first implementation

[gusfcarvalho]

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[Copilot]

Pull request overview

This PR introduces the first working implementation of a Compliance Framework GitLab Repositories plugin that authenticates to GitLab, enumerates projects in a group, collects repo/CI/MR governance data, and evaluates OPA policies per project.

Changes:

• Implement core plugin lifecycle (Configure, Init, Eval) plus GitLab data collection (projects, approvals, pipelines, MRs, releases, CODEOWNERS, environments, push rules).
• Add supporting data model types for policy input (SaturatedProject, OpenMergeRequest).
• Add extensive unit tests and introduce Go module + Makefile build scaffolding.

Reviewed changes

Copilot reviewed 9 out of 10 changed files in this pull request and generated 10 comments.

Show a summary per file

File	Description
main.go	Core plugin implementation, config/auth handling, project enumeration, policy evaluation + evidence creation
types.go	Policy input structs used to marshal GitLab data into OPA
merge_requests.go	Fetch open MRs and enrich with per-MR approval state
org_teams.go	Fetch group membership (inherited members) for policy reasoning
codeowners.go	Fetch and decode CODEOWNERS content from standard locations
plugin_test.go	Broad unit tests for GitLab client creation and data-gathering methods
config_test.go	Unit tests for config validation and pipeline lookback parsing
Makefile	Basic build/help targets (currently with OPA precheck and build invocation)
go.mod / go.sum	Module definition and dependency lockfile updates

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[Copilot]

Pull request overview

Copilot reviewed 9 out of 10 changed files in this pull request and generated 3 comments.

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[Copilot]

Pull request overview

Copilot reviewed 9 out of 10 changed files in this pull request and generated 2 comments.

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