Add the country translation engines (ip-intelligence.translation)

Background

On-premise IP Intelligence returns CountryCodesGeographical and
CountryCodesPopulation as weighted lists of ISO country codes. The demos need
localized, complete, ordered country name and code lists so they can render a
country dropdown with the most probable country at the top. Cloud already
returns these properties in final form, so this work is on the on-premise path
only and the cloud engine is untouched. This is the Java port of the .NET
FiftyOne.IpIntelligence.Translation package, building on the new
pipeline.translation module.

Objectives

• Engine 1: translate the weighted ISO codes from IP Intelligence to English
  country names.
• Engine 2: translate those English names to the browser language and build
  complete, index-aligned, ordered "All" lists (most probable countries first
  by weight, then every remaining country alphabetically by translated name).
• Localize by Accept-Language (or a query.translation override), defaulting
  to English when the language is English or unknown.

Key Decisions

• New module ip-intelligence.translation, depending on the new
  pipeline.translation, plus ip-intelligence.shared for the
  IPIntelligenceData interface.
• IP Intelligence element data key: as of pipeline change Fix cloud IP Intelligence engine: correct product key and support weighted/IP types #129 the on-premise
  and cloud engines return "ip", so that is the default source key for
  Engine 1. Because the key has changed between engine versions, Engine 1's
  source key is configurable
  (CountryCodeTranslationEngineBuilder.setSourceElementDataKey, default
  "ip"). Engine 2 reads the weighted codes by IPIntelligenceData type, so it
  is key-agnostic.
• The translation YAML files are not shipped as new data. They are wired in at
  build time from the IP Intelligence data submodule
  (ip-intelligence-cxx/ip-intelligence-data/Translations) into the jar,
  mirroring the .NET project which links the same files.
• Resources loads the files from the classpath by their known names, so
  loading is reliable from a directory or a packaged jar.

Changes

• New ip-intelligence.translation module:
  • Constants, Resources.
  • data: ICountryCodeTranslationData / CountryCodeTranslationData,
    ICountriesTranslationData / CountriesTranslationData.
  • flowelements: CountryCodeTranslationEngine (+ builder, configurable
    source key), CountriesTranslationEngine (+ builder) with the ordering
    algorithm and the locale-aware Collator sort, recording the sorting
    culture in SortingCultureUsed.
• pom.xml: register the module in <modules>; copy the translation YAML from
  the submodule at build time.

Testing

mvn -pl ip-intelligence.translation test (JDK 17, source/target 1.8). 22
tests, all passing, PMD and -Werror clean.

• TranslationTests (21): the 12 tests ported from the .NET suite plus 9 gap
  tests (evidence-key precedence including query.translation overriding the
  header, weights preserved through translation, equal-weight tie break by
  name, unknown locale falling back to English, a missing single name staying
  English, full index alignment across the alphabetical tail,
  SortingCultureUsed, and population names differing from geographical).
  These use a real mini pipeline (a stub IP engine, then the two engines).

• CountryTranslationIntegrationTest (1): drives the real on-premise engine
  with the 6 GB enterprise data file, then the two engines. With 8.8.8.8 and
  fr_FR the dropdown leads with the most probable country (Pakistan in this
  data) and is followed by all 250 countries alphabetically in French, with the
  code and name lists index-aligned. Skipped automatically when no data file is
  present. Run it with
  -DTestDataFile=<path to a .ipi> (or set 51DEGREES_IPI_PATH).

  JDK note: build this module with JDK 17. The repo's PMD-on-compile check uses
  an ASM that cannot parse JDK 25 class files.

Notes

• Additive only. One new module plus one line in the parent pom <modules>.
  The on-premise engine and the cloud path are unchanged.
• Cross-repo release dependency. This module depends on pipeline.translation,
  a new module in pipeline-java. ip-intelligence-java consumes pipeline at
  the published ${pipeline.version} (currently 4.5.10), while the local
  pipeline-java source is 4.5.7-SNAPSHOT. So:
  • The committed pom references pipeline.translation at ${pipeline.version},
    consistent with the other pipeline dependencies.
  • A clean build (and CI) is green only once pipeline-java publishes
    pipeline.translation in the pipeline line this repo targets. Merge or
    release the pipeline-java change first.
  • For local verification the module was built from the pipeline-java
    worktree and installed into the local Maven repo, then also installed under
    version 4.5.10 (a binary-compatible bridge, verified with javap) so this
    repo resolves it at ${pipeline.version}.
• Follow-up: the on-premise getting-started web dropdown and the console
  example with an ordering test live in ip-intelligence-java-examples and
  consume this module.