#2515: add UrlUpdater for KubeLinter (kube-linter)

[majesteSil]

This PR fixes #2515

Adds a UrlUpdater for KubeLinter so the ide-urls repository discovers the versions and download URLs of the new kube-linter tool. This is the first of two PRs for #2515: the commandlet itself follows in a second PR that consumes the URLs discovered here (the commandlet cannot resolve real download URLs until this updater is merged).

Implemented changes:

• KubeLinterUrlUpdater extends GithubUrlReleaseUpdater — discovers versions from the stackrox/kube-linter GitHub releases and maps the six per-platform/architecture .tar.gz assets (linux / darwin / windows × x64 + arm64).
• Gates on a minimum version (0.7.0) — below that the release assets are incomplete/inconsistent (e.g. v0.6.8 has no windows_arm64.tar.gz, v0.5.1 has no darwin.tar.gz), so the six <os>_<arch>.urls files are only produced for versions with a complete asset set.
• Registers the updater in UpdateManager.
• Adds KubeLinterUrlUpdaterTest (WireMock) asserting all six platform/architecture .urls files (with checksum) are created, plus a kube-linter-releases.json mock.

Notes:

• The version is derived from the GitHub release name field (e.g. v0.8.3); the v prefix is stripped via getVersionPrefixToRemove().
• Asset names use the OS-specific darwin name for macOS (not mac), and the version is carried by the release tag (not the file name), so URLs follow the explicit per-OS pattern (as in InsoUrlUpdater).
• No CHANGELOG.adoc entry and no LICENSE.adoc row for this PR — precedent for a url-updater-only change (cf. Create InsoUrlUpdater #1905 Inso UrlUpdater) is that those belong to the commandlet PR, which adds the tool to the user-facing tool set.

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Testing instructions

1. Run the new unit test:
   mvn -o -pl url-updater -am test -Dtest=KubeLinterUrlUpdaterTest -Dsurefire.failIfNoSpecifiedTests=false
   (-am builds the upstream ide-cli module the url-updater depends on; the flag lets the cli module pass with no matching test.) Result: 1/1 green.
2. The pre-commit hook runs mvn -q verify -pl '!documentation' (Spotless format, Checkstyle lint, build + tests) — green for the changed files (the remaining Checkstyle violations in this module are pre-existing legacy files, out of scope per the ratchet).
3. (Production, manual) The UpdateInitiator (run nightly via GitHub Actions) will now include KubeLinterUrlUpdater and populate ide-urls under kube-linter/kube-linter/<version>/<os>_<arch>.urls. A manual local run is possible via the UpdateInitiator main class (see documentation/contributing/commandlet-and-url-updater.adoc).

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Checklist for this PR

• When running mvn clean test locally all tests pass and build is successful — full mvn clean test from the repo root is avoided on purpose (it triggers the long-running documentation module, see AGENTS.md); instead the pre-commit hook's mvn -q verify -pl '!documentation' (build + all module tests) ran green, and the new KubeLinterUrlUpdaterTest is green.
• PR title is of the form #«issue-id»: «brief summary»
• PR top-level comment summaries what has been done and contains link to addressed issue
• PR and issue(s) have suitable labels (added enhancement / commandlet; adjust if a more specific updater label is preferred)
• Issue is set to In Progress and assigned to the contributor (or there is no issue)
• You followed all coding conventions (Spotless + Checkstyle clean on the changed files)
• You have added the issue implemented by your PR in CHANGELOG.adoc — N/A: url-updater-only change, no user-facing tool yet (precedent Create InsoUrlUpdater #1905); the commandlet PR carries the CHANGELOG entry.
• You have not changed any dependency in pom.xml / updated LICENSE — N/A: no runtime dependency added here (KubeLinter is an installed tool, not a library); the LICENSE.adoc row is added in the commandlet PR.
• You have formulated clear instructions on how to test your contribution under "Testing instructions"

Checklist for tool commandlets

N/A for this PR — this PR only adds the UrlUpdater, not the commandlet. The commandlet (second PR) will be checked against this list (installation, sandbox, LICENSE.adoc, help texts, dependency install, KUBE_LINTER_VERSION/KUBE_LINTER_EDITION, platform coverage).

[coveralls]

Coverage Report for CI Build 37664927752

Coverage increased (+0.03%) to 74.231%

Details

• Coverage increased (+0.03%) from the base build.
• Patch coverage: No coverable lines changed in this PR.
• 15 coverage regressions across 1 file.

Uncovered Changes

No uncovered changes found.

Coverage Regressions

15 previously-covered lines in 1 file lost coverage.

File	Lines Losing Coverage	Coverage
com/devonfw/tools/ide/url/updater/UpdateManager.java	15	38.82%

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Coverage Stats

Relevant Lines:	19593
Covered Lines:	15211
Line Coverage:	77.63%
Relevant Branches:	8689
Covered Branches:	5783
Branch Coverage:	66.56%
Branches in Coverage %:	Yes
Coverage Strength:	3.33 hits per line

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💛 - Coveralls

[laim2003]

Thanks @majesteSil, great work, I just found some very minor improvements. Otherwise looks great!