Fix version text with go install

[goccy]

• Use debug.ReadBuildInfo() for go install
• Fix default version text ( dev => (devel) )
• Add version command to protoc-gen-grpc-federation

[github-actions]

Code Metrics Report

	main (b4e8f00)	#278 (3e2c85a)	+/-
Coverage	65.3%	65.3%	+0.0%
Code to Test Ratio	1:0.3	1:0.3	+0.0
Test Execution Time	7m4s	6m54s	-10s

Details

  |                     | main (b4e8f00) | #278 (3e2c85a) |  +/-  |
  |---------------------|----------------|----------------|-------|
+ | Coverage            |          65.3% |          65.3% | +0.0% |
  |   Files             |             77 |             78 |    +1 |
  |   Lines             |          13803 |          13809 |    +6 |
+ |   Covered           |           9019 |           9024 |    +5 |
+ | Code to Test Ratio  |          1:0.3 |          1:0.3 |  +0.0 |
  |   Code              |          42413 |          42453 |   +40 |
+ |   Test              |          15913 |          15932 |   +19 |
+ | Test Execution Time |           7m4s |          6m54s |  -10s |

Code coverage of files in pull request scope (0.0% → 83.3%)

Files	Coverage	+/-
grpc/federation/version.go	83.3%	+83.3%

---

Reported by octocov

PR Overview

This PR updates the version text reported by the generated gRPC federation-related files, replacing "dev" with "(devel)" to support the new installation mechanism using debug.ReadBuildInfo(), and adds a version command to the protoc-gen-grpc-federation plugin.

• Change version text from "dev" to "(devel)" in all generated files
• Add a version command for protoc-gen-grpc-federation

Reviewed Changes

File	Description
_examples/11_multi_service/federation/other_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/16_code_gen_plugin/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/06_alias/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/01_minimum/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/05_async/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/02_simple/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/11_multi_service/federation/reaction_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/03_custom_resolver/federation/other_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/10_oneof/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/04_timeout/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/07_autobind/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/11_multi_service/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/14_condition/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/12_validation/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/13_map/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/09_multi_user/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/03_custom_resolver/federation/federation_grpc_federation.pb.go	(Repeated change) Updates version text from "dev" to "(devel)"
_examples/08_literal/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/15_cel_plugin/federation/federation_grpc_federation.pb.go	Updates version text from "dev" to "(devel)"
_examples/15_cel_plugin/plugin/plugin_grpc_federation.pb.go	Updates version text from "dev" to "(devel)" in both file header and plugin version info

Copilot reviewed 43 out of 43 changed files in this pull request and generated no comments.

[utahta]

👍