fix: implement comprehensive Go module dependency resolution

Major improvements to Go component build reliability:

## Go.sum Support Added:
- Added go_sum attribute to go_wasm_component rule in go/defs.bzl
- Updated setup_go_module_action to include go.sum files in workspace
- All go_component targets now specify go_sum parameter

## Dependency Resolution:
- Fixed all 'missing go.sum entry' errors for go.bytecodealliance.org/cm
- Go module checksum validation now works correctly
- Hermetic builds maintain dependency integrity

## Target Status:
✅ WORKING: Non-WIT Go targets (simple_wasi, debug targets)
✅ RESOLVED: Go.sum dependency errors completely eliminated
⏳ WIT targets: Known upstream TinyGo limitations (see issue #80)

## Files Changed:
- go/defs.bzl: Added go_sum parameter and updated function signatures
- tools/bazel_helpers/file_ops_actions.bzl: Enhanced workspace setup
- examples/go_component/BUILD.bazel: Added go_sum to all targets
- examples/go_component/wit/calculator.wit: Updated to WASI 0.2.0

This resolves the core Go module dependency issues that were blocking CI builds.

Author: avrabe

examples/go_component/BUILD.bazel

@@ -17,7 +17,7 @@ wit_library(
     name = "calculator_wit",
     srcs = ["wit/calculator.wit"],
     world = "calculator-world",
-    deps = ["@wasi_io//:streams"],  # Add WASI IO dependency for stream imports
+    deps = ["@wasi_io_v020//:streams"],  # Add WASI IO 0.2.0 dependency required by TinyGo
 )
 
 # Simple calculator WIT - pure interface, TinyGo handles WASI internally

examples/go_component/wit/calculator.wit

@@ -37,7 +37,7 @@ interface calculator {
 
 world calculator-world {
     /// Import WASI interfaces required by TinyGo stdlib
-    import wasi:io/streams@0.2.3;
+    import wasi:io/streams@0.2.0;
 
     export calculator;
 }