Migrate to Gradle version catalog and rename sslcontext-kickstart to ayza

[rymsha]

Summary

Migrate build.gradle to use a Gradle version catalog at gradle/libs.versions.toml, matching the convention used in the xp monorepo.

• All inline version strings (methanol, junit-jupiter, mockito-core, slf4j-api, okhttp-tls, mockwebserver) are now libs.xxx references.
• The ext { okhttpVersion = '5.3.2' } block is removed; the shared okhttp version is a single okhttp key in the catalog referenced by both okhttp-tls and mockwebserver.
• The com.enonic.defaults plugin moves to the [plugins] table and is applied via alias(libs.plugins.enonic.defaults).

sslcontext-kickstart → ayza rename

io.github.hakky54:sslcontext-kickstart was renamed to io.github.hakky54:ayza in September 2025 (10.0.0). Bumped from 9.2.1 → 10.0.5.

The Java package nl.altindag.ssl.* is unchanged, so no source edits are required. Reviewed the 9.x → 10.x changelog; the features used by HttpClientFactory (SSLFactory.builder(), withTrustMaterial / withDefaultTrustMaterial / withIdentityMaterial, getSslContext, getSslParameters) were not touched in any breaking way.

Test plan

• ./gradlew build runs green locally (all tests pass)
• ./gradlew dependencies --configuration runtimeClasspath confirms io.github.hakky54:ayza:10.0.5 is on the runtime classpath
• CI is green

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.42%. Comparing base (68a43e7) to head (2b94ad4).

Additional details and impacted files

@@            Coverage Diff            @@
##             master     #216   +/-   ##
=========================================
  Coverage     91.42%   91.42%           
  Complexity      156      156           
=========================================
  Files             9        9           
  Lines           513      513           
  Branches         58       58           
=========================================
  Hits            469      469           
  Misses           23       23           
  Partials         21       21           

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