feature: add JSON schema

[nickdnk]

Reason for This PR

Add json schema.

License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the MIT license.

PR Checklist

[Author TODO: Meet these criteria.]
[Reviewer TODO: Verify that these criteria are met. Request changes if not]

• All commits in this PR are signed (git commit -s).
• The reason for this PR is clearly provided (issue no. or explanation).
• The description of changes is clear and encompassing.
• Any required documentation changes (code and docs) are included in this PR.
• Any user-facing changes are mentioned in CHANGELOG.md.
• All added/changed functionality is tested.

Summary by CodeRabbit

• New Features

  • Introduced a JSON schema for the Memcached plugin configuration, ensuring proper validation and structure for user settings.
  • Defined configuration parameters, including a required addr property for specifying server addresses.

• Documentation

  • Added example and default values for the addr property to assist users in configuring the plugin correctly.

[coderabbitai]

Walkthrough

A new JSON schema file has been added for the Memcached plugin in RoadRunner. This schema outlines the structure and validation rules for the plugin's configuration parameters, specifically defining the addr property as an array that must contain at least one string item. The schema adheres to the JSON Schema Draft 2019-09 specifications and includes a default value for the addr property.

Changes

File	Change Summary
schema.json	Introduced a new JSON schema for the Memcached plugin configuration, defining the addr property as an array with validation rules and a default value.

Poem

In the land of code where bunnies hop,
A schema was born, making config non-stop.
With addr defined, and rules so clear,
Memcached now sings, "No need to fear!"
Hopping through bytes, with joy we play,
Validations in place, hip-hip-hooray! 🐇✨

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📜 Recent review details

Configuration used: CodeRabbit UI
Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between 4c9bef5 and 77732e0.

📒 Files selected for processing (1)

• schema.json (1 hunks)

✅ Files skipped from review due to trivial changes (1)

• schema.json

---

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 44.39%. Comparing base (295f2ed) to head (77732e0).
Report is 119 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #76       +/-   ##
===========================================
+ Coverage        0   44.39%   +44.39%     
===========================================
  Files           0        8        +8     
  Lines           0      696      +696     
===========================================
+ Hits            0      309      +309     
- Misses          0      344      +344     
- Partials        0       43       +43     

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