Migrate .goreleaser.yml to v2 format

[Copilot]

GoReleaser v2.13.2+ requires explicit version: 2 in configuration files. The CI was failing with: "only version: 2 configuration files are supported, yours is version: 0".

Changes

• Add version: 2 declaration
• Replace deprecated archives.replacements with name_template using Go templating:

  archives:
    - name_template: >-
        {{ .ProjectName }}_
        {{- title .Os }}_
        {{- if eq .Arch "amd64" }}x86_64
        {{- else if eq .Arch "386" }}i386
        {{- else }}{{ .Arch }}{{ end }}

• Replace snapshot.name_template with snapshot.version_template
• Remove deprecated format and format_overrides fields (defaults to tar.gz, zip for Windows)
• Add LICENSE and README.md to archive contents

Validated with goreleaser check.

Original prompt

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This section details on the original issue you should resolve

<issue_title>Fix go releaser config</issue_title>
<issue_description>/opt/hostedtoolcache/goreleaser-action/2.13.2/x64/goreleaser release --clean
• only version: 2 configuration files are supported, yours is version: 0, please update your configuration
⨯ release failed after 0s error=only version: 2 configuration files are supported, yours is version: 0, please update your configuration
2s
Run goreleaser/goreleaser-action@v2

Downloading https://github.com/goreleaser/goreleaser/releases/download/v2.13.2/goreleaser_Linux_x86_64.tar.gz
Extracting GoReleaser
/usr/bin/tar xz --warning=no-unknown-keyword --overwrite -C /home/runner/work/_temp/19736587-98f0-4d0e-9140-589bf069bb4c -f /home/runner/work/_temp/f60430e3-338f-4e38-95b6-3afe504da877
GoReleaser latest installed successfully
v1.0.1 tag found for commit 'dc68988'
/opt/hostedtoolcache/goreleaser-action/2.13.2/x64/goreleaser release --clean
• only version: 2 configuration files are supported, yours is version: 0, please update your configuration
⨯ release failed after 0s error=only version: 2 configuration files are supported, yours is version: 0, please update your configuration
Error: The process '/opt/hostedtoolcache/goreleaser-action/2.13.2/x64/goreleaser' failed with exit code 1
0s
</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Fix go releaser config #181

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