Add requirements docs-as-code organization structure

[jorgecasal]

This pull request introduces a three-level requirements hierarchy for the SOME/IP Gateway:

• docs/requirements/index.rst: conventions reference (folder structure, component names, identifier scheme, mandatory attributes)
• docs/requirements/stakeholder.rst: stakeholder requirements
• docs/requirements/feature/index.rst: feature requirements skeleton
• docs/requirements/component/index.rst: component requirements skeleton
• docs/tc8_conformance/: TC8 SOME/IP conformance test requirements

[github-actions]

License Check Results

🚀 The license check job ran with the Bazel command:

bazel run //:license-check

Status: ⚠️ Needs Review

Click to expand output

[License Check Output]
2026/03/04 12:54:08 Downloading https://releases.bazel.build/8.3.0/release/bazel-8.3.0-linux-x86_64...
Extracting Bazel installation...
Starting local Bazel server (8.3.0) and connecting to it...
INFO: Invocation ID: 72761840-f553-45ad-8dce-7c4a853e6dea
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WARNING: For repository 'googletest', the root module requires module version googletest@1.17.0, but got googletest@1.17.0.bcr.2 in the resolved dependency graph. Please update the version in your MODULE.bazel or set --check_direct_dependencies=off
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Analyzing: target //:license-check (182 packages loaded, 9889 targets configured)

Analyzing: target //:license-check (182 packages loaded, 9889 targets configured)

Analyzing: target //:license-check (182 packages loaded, 9889 targets configured)

Analyzing: target //:license-check (182 packages loaded, 9889 targets configured)

INFO: Analyzed target //:license-check (183 packages loaded, 11824 targets configured).
[8 / 13] Creating runfiles tree bazel-out/k8-opt-exec-ST-d57f47055a04/bin/external/score_tooling+/dash/tool/formatters/dash_format_converter.runfiles [for tool]; 0s local
INFO: From Generating Dash formatted dependency file ...:
INFO: Successfully converted 2 packages from Cargo.lock to bazel-out/k8-fastbuild/bin/formatted.txt
[10 / 13] JavaToolchainCompileClasses external/rules_java+/toolchains/platformclasspath_classes; 0s disk-cache, processwrapper-sandbox
[11 / 13] JavaToolchainCompileBootClasspath external/rules_java+/toolchains/platformclasspath.jar; 0s disk-cache, processwrapper-sandbox
INFO: Found 1 target...
Target //:license.check.license_check up-to-date:
  bazel-bin/license.check.license_check
  bazel-bin/license.check.license_check.jar
INFO: Elapsed time: 221.408s, Critical Path: 2.52s
INFO: 13 processes: 9 internal, 3 processwrapper-sandbox, 1 worker.
INFO: Build completed successfully, 13 total actions
INFO: Running command line: bazel-bin/license.check.license_check ./formatted.txt <args omitted>
usage: org.eclipse.dash.licenses.cli.Main [-batch <int>] [-cd <url>]
       [-confidence <int>] [-ef <url>] [-excludeSources <sources>] [-help] [-lic
       <url>] [-project <shortname>] [-repo <url>] [-review] [-summary <file>]
       [-timeout <seconds>] [-token <token>]

[github-actions]

The created documentation from the pull request is available at: docu-html