Add Go (Golang) language support to func init via the Native worker runtime

[harshivcodes]

This PR adds Go language support to the func init command in Azure Functions Core Tools. Go is supported under the Native worker runtime, which hosts language-native binaries directly. When a user runs func init --worker-runtime native, the CLI scaffolds a complete Go project with module initialization, dependency resolution, and a starter main.go.

Core runtime registration

• Added WorkerRuntime.Native enum value with "go" and "golang" as aliases
• --worker-runtime native, --worker-runtime go, and --worker-runtime golang all resolve to Native
• When go or golang is used, a warning is printed clarifying that Golang runs under the native runtime
• Added Constants.Languages.Golang and wired up default language/programming model mappings
• Native appears in the interactive runtime selection picker

Go project scaffolding (GoHelpers.cs)

• Detects installed Go version (minimum 1.24 required)
• Runs go mod init, go get github.com/azure/azure-functions-golang-worker, and go mod tidy
• --skip-go-mod-tidy flag to skip the tidy step (useful for CI or when the worker module is unreachable)

Static resources

• Embedded main.go template (minimal package main + empty main())
• Reuses existing .funcignore template
• New entry in StaticResources.props and StaticResources.cs

InitAction integration

• InitLanguageSpecificArtifacts handles WorkerRuntime.Native: calls GoHelpers.SetupProject, writes main.go and .funcignore
• Docker flag emits a warning: "Docker support for the native worker runtime is not yet available"
• Language selection wizard surfaces for Native runtime

Testing

• 27 unit tests passing (GoHelperTests + InitActionGoTests)
• 4 E2E test cases defined (NativeGoInitTests)
• Manual validation of 8 scenarios: --worker-runtime native/go/golang, --skip-go-mod-tidy, named subfolder, --force in non-empty dir, --docker warning, and interactive picker

Test	Scenario	Result
1	--worker-runtime native	All files created; FUNCTIONS_WORKER_RUNTIME: "native" set; go.mod + go.sum present
2	--worker-runtime go	Same output — alias works correctly
3	--worker-runtime golang	Same output — alias works correctly
4	--skip-go-mod-tidy	Shows “Skipped” message; go.sum still exists (from go get)
5	Named subfolder test-go-5	Created subfolder and initialized inside it
6	--force in non-empty directory	dummy.txt preserved alongside all new files
7	--docker	Docker warning emitted: “Docker support for the native worker runtime is not yet available. Skipping Dockerfile creation.” No Dockerfile created
8	Interactive (no runtime flag)	Picker shows Native as option 7 in the list

Output from local testing
test-results.txt