Add multi-architecture support for Linux platforms and FreeBSD/Windows ARM64

[Copilot]

This PR adds support for additional architectures to resolve installation failures on non-x86 platforms. Previously, users on architectures like s390x would encounter:

> [linux/s390x  6/17] RUN helm plugin install https://github.com/databus23/helm-diff && rm -rf /tmp/helm-*:
#0 2.445 mkdir: can't create directory '': No such file or directory
#0 2.484 No prebuild binary for linux-s390x.
#0 2.485 Failed to install helm-diff

Changes Made

New Linux architectures now supported:

• linux/arm/v6 (32-bit ARM EABI5)
• linux/arm/v7 (32-bit ARM EABI5)
• linux/ppc64le (64-bit PowerPC little endian)
• linux/s390x (64-bit IBM System z)

New FreeBSD/Windows architectures now supported:

• freebsd/arm64 (64-bit ARM)
• windows/arm64 (64-bit ARM)

Updated build configuration:

• GoReleaser: Added separate build configuration for Linux-specific architectures with proper ARM variant handling, removed ignore section to build all supported architectures
• Makefile: Extended dist target to build all new architectures with appropriate GOARM flags
• Install script: Enhanced architecture detection and added all new platforms to supported list

Verification:

• All new binaries compile correctly for their target architectures
• Generated archives contain proper file structure (plugin.yaml, binary, docs)
• Install script logic correctly detects and handles all new architectures
• Existing functionality and tests remain unaffected

The plugin can now be successfully installed on all requested platforms, expanding compatibility from the original 6 supported platforms to 12 total platforms.

Fixes #436.

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[yxxhero]

@copilot merge main branch.

[Copilot]

@copilot merge main branch.

Merged master branch successfully. The branch now includes the latest 4 commits from master including CI workflow updates, dependency bumps, and GitHub Copilot instructions. Build and functionality verified after merge. Commit: 596f5ad

[yxxhero]

@copilot why we should add those code?

[Copilot]

The ignore section prevents GoReleaser from building unsupported platform combinations.

The default build includes both freebsd and windows in goos, and arm64 in goarch. Without these ignore rules, GoReleaser would build all combinations including freebsd-arm64 and windows-arm64.

However, the install script only supports:

• freebsd-amd64 (not arm64)
• windows-amd64 (not arm64)

So these ignore rules prevent building binaries that users cannot install, avoiding unnecessary build artifacts and potential confusion.

[yxxhero]

@copilot we can add those into install script. so please remove ignore.

[Copilot]

Removed the ignore section from GoReleaser configuration and added freebsd-arm64 and windows-arm64 to the install script's supported platforms list. Now GoReleaser will build binaries for all architecture combinations and users on those platforms can successfully install the plugin. Commit: 45d47da