refactor: replace wazero and php wasm binaries with go-phplint

[Soner (shyim)]

What changed?

• Replaced wazero WebAssembly runtime and external php-*.wasm binary downloads with github.com/shyim/go-phplint (v0.2.0).
• Removed the internal/phplint package entirely, calling go-phplint directly inside internal/extension/platform.go.
• Removed entitlements.xml and removed the macOS code signing entitlements configuration from .goreleaser.yaml (since JIT/executable memory permissions are no longer required without wazero).
• Removed SHOPWARE_CLI_DISABLE_WASM_CACHE from GitHub Actions workflow.

Why?

• Binary size reduction: Reduced compiled CLI binary size by ~1.98 MB (~4.0% reduction, down from ~49.5 MB to ~47.6 MB).
• Execution speed: PHP linting execution is now orders of magnitude faster (pure Go parser vs instantiating WASM modules per file).
• Offline / Sandbox friendly: PHP linting no longer requires network requests to fetch WASM binaries or managing a WASM compilation cache on disk.
• Code cleanup: Eliminated the custom internal/phplint wrapper package and extra entitlement files.

How was this tested?

• Ran go test ./... and verified all test suites pass.
• Verified sandboxed execution via ./scripts/run-tests.sh.
• Tested PHP file linting functionality on sample plugins.

Related issue or discussion

N/A

[Codecov Comments Bot (codecov-commenter)]

Codecov Report

❌ Patch coverage is 0% with 44 lines in your changes missing coverage. Please review.
✅ Project coverage is 53.79%. Comparing base (3340b47) to head (6b9201a).

Files with missing lines	Patch %	Lines
internal/extension/platform.go	0.00%	44 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1261      +/-   ##
==========================================
+ Coverage   53.63%   53.79%   +0.15%     
==========================================
  Files         303      300       -3     
  Lines       23325    23243      -82     
==========================================
- Hits        12511    12504       -7     
+ Misses      10787    10712      -75     
  Partials       27       27              

Flag	Coverage Δ
go-test	53.79% <0.00%> (+0.15%)	⬆️

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