chore: prepare needs templates

[AlexanderLanin]

Preparationm for needs_templates

[Copilot]

Pull request overview

This PR prepares shared Sphinx-Needs templates and wires them into the score_sphinx_bundle extension so the extension can locate templates at runtime. It also hardens some metamodel parsing/validation logic.

Changes:

• Adds a src/needs_templates Bazel filegroup and an example .need template.
• Adds the templates as a data dependency of score_sphinx_bundle and sets needs_template_folder from the extension’s location.
• Improves error handling for external needs JSON parsing and adjusts the ID-length check logic for example_feature IDs.

Reviewed changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
src/needs_templates/example.need	Adds a sample Sphinx-Needs template file.
src/needs_templates/BUILD	Exposes .need templates via a public Bazel filegroup.
src/extensions/score_sphinx_bundle/BUILD	Ships templates alongside the extension via Bazel data.
src/extensions/score_sphinx_bundle/init.py	Derives and sets needs_template_folder from __file__.
src/extensions/score_metamodel/external_needs.py	Adds JSON parse error handling for Bazel-provided DATA.
src/extensions/score_metamodel/checks/attributes_format.py	Fixes parts[1] indexing hazard and updates warning message logic.

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[MaximilianSoerenPollak]

Done together in a call.
First PR to build next stuff.

Approved.

[github-actions]

License Check Results

🚀 The license check job ran with the Bazel command:

bazel run --lockfile_mode=error //src:license-check

Status: ⚠️ Needs Review

Click to expand output

[License Check Output]
Extracting Bazel installation...
Starting local Bazel server (8.6.0) and connecting to it...
INFO: Invocation ID: 93083099-603e-4914-a644-e9ee1ff08504
Computing main repo mapping: 
Loading: 
Loading: 0 packages loaded
Loading: 0 packages loaded
Loading: 0 packages loaded
    currently loading: src
WARNING: Target pattern parsing failed.
ERROR: Skipping '//src:license-check': no such target '//src:license-check': target 'license-check' not declared in package 'src' defined by /home/runner/work/docs-as-code/docs-as-code/src/BUILD
ERROR: no such target '//src:license-check': target 'license-check' not declared in package 'src' defined by /home/runner/work/docs-as-code/docs-as-code/src/BUILD
INFO: Elapsed time: 5.464s
INFO: 0 processes.
ERROR: Build did NOT complete successfully
ERROR: Build failed. Not running target

[github-actions]

Documentation preview for this pull request is available at:
pr-762: https://eclipse-score.github.io/docs-as-code/pr-762/