fix(wasm): add replace directive for nikunjy/rules to fix semver prerelease handling

[thomaspoignant]

Description

Problem: The WASM module's dependency on github.com/nikunjy/rules has semver comparison issues with prerelease versions, which can break flag evaluation in the WASM build.

Resolution: Add a replace directive in cmd/wasm/go.mod to use the fork github.com/hairyhenderson/rules (from nikunjy/rules#43) until that fix is merged and a new release is available. The go.mod is also tidied: require blocks are reorganized and github.com/blang/semver is updated to v4.

Testing: Build and test the WASM module (make build-wasm, tests in cmd/wasm). No breaking changes; this is dependency-only.

Closes issue(s)

Resolve #4736

Checklist

• I have tested this code
• I have added unit test to cover this code
• I have updated the documentation (README.md and /website/docs)
• I have followed the contributing guide

[netlify]

✅ Deploy Preview for go-feature-flag-doc-preview canceled.

Name	Link
🔨 Latest commit	3ec34a1
🔍 Latest deploy log	https://app.netlify.com/projects/go-feature-flag-doc-preview/deploys/698e16a953e8ca00086a91d1

[kodiakhq]

This PR currently has a merge conflict. Please resolve this and then re-add the automerge label.

[gemini-code-assist]

Code Review

This pull request addresses a semantic versioning issue in the WASM module by using a replace directive in go.mod to point to a forked repository. While this resolves the immediate issue, it introduces a medium-severity supply chain risk due to the use of an unofficial forked dependency. This temporary fix should be monitored and reverted once the upstream fix is available. Additionally, the PR tidies up the go.mod file, and a minor issue with the pseudo-version in the replace directive has been identified and a suggestion provided.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.75%. Comparing base (c1b2948) to head (3ec34a1).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #4808   +/-   ##
=======================================
  Coverage   85.75%   85.75%           
=======================================
  Files         153      153           
  Lines        6537     6537           
=======================================
  Hits         5606     5606           
+ Misses        700      699    -1     
- Partials      231      232    +1     

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[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud