Add ff support and consolidated actions toolsets

[mattdholloway]

This pull request completes the Actions consolidation rollout by porting these changes back to OSS and allowing feature flags to be used to control which version of the Actions toolset is enabled: legacy or consolidated.

Closes: https://github.com/github/copilot-agent-services/issues/1053

[Copilot]

Pull request overview

This PR adds feature flag support for consolidated GitHub Actions tools, allowing the MCP server to switch between individual granular tools and consolidated multi-method tools. When the remote_mcp_consolidated_actions feature flag is enabled, four new consolidated tools replace 14 individual tools.

Key Changes

• Introduces FeatureFlagConsolidatedActions constant to control tool availability via feature flags
• Adds four new consolidated tools: actions_list, actions_get, actions_run_trigger, and get_job_logs (consolidated version)
• Sets FeatureFlagDisable on all existing individual Actions tools to disable them when consolidated mode is active
• Updates test validation logic to allow duplicate tool names for feature-flagged tools (since they're mutually exclusive at runtime)

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
pkg/github/actions.go	Adds feature flag constant, method constants for consolidated tools, applies FeatureFlagDisable to 14 existing tools, implements 4 new consolidated tools with FeatureFlagEnable, and adds 13 helper functions to support consolidated tool operations
pkg/github/tools.go	Registers the 4 new consolidated tools in the AllTools function
pkg/github/tools_validation_test.go	Updates TestNoDuplicateToolNames to allow duplicate names for feature-flagged tools since they are mutually exclusive at runtime
cmd/github-mcp-server/main.go	Adds safety checks with viper.IsSet before unmarshaling tools and features configuration to prevent errors when keys are absent
README.md	Documents the 4 new consolidated tools with their parameters and descriptions

[Copilot]

Pull request overview

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

[Copilot]

The test structure starting at line 1454 appears to be orphaned or incorrectly placed within the Test_RerunFailedJobs function. This test table should either be part of a new test function or removed if it duplicates the existing test logic above it.