Add sphing toolchain

[ramceb]

📌 Description

This PR adds a bazel toolchain for sphinx builds,
which allows to inject the binary which is used
for build html documentation

🚨 Impact Analysis

• This change does not violate any tool requirements and is covered by existing tool requirements
• This change does not violate any design decisions
• Otherwise I have created a ticket for new tool qualification

✅ Checklist

• Added/updated documentation for new or changed features
• Added/updated tests to cover the changes
• Followed project coding standards and guidelines

[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]
2026/04/02 22:00:55 Downloading https://releases.bazel.build/8.4.2/release/bazel-8.4.2-linux-x86_64...
Extracting Bazel installation...
Starting local Bazel server (8.4.2) and connecting to it...
INFO: Invocation ID: 0aa9a688-0132-42d8-95d1-54cc59e6f14d
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
Loading: 
Loading: 0 packages loaded
Loading: 0 packages loaded
Loading: 0 packages loaded
    currently loading: src
Loading: 0 packages loaded
    currently loading: src
Loading: 0 packages loaded
    currently loading: src
Analyzing: target //src:license-check (1 packages loaded, 0 targets configured)
Analyzing: target //src:license-check (1 packages loaded, 0 targets configured)

Analyzing: target //src:license-check (59 packages loaded, 9 targets configured)

Analyzing: target //src:license-check (70 packages loaded, 9 targets configured)

Analyzing: target //src:license-check (93 packages loaded, 188 targets configured)

Analyzing: target //src:license-check (129 packages loaded, 1395 targets configured)

Analyzing: target //src:license-check (141 packages loaded, 2696 targets configured)

Analyzing: target //src:license-check (141 packages loaded, 2696 targets configured)

Analyzing: target //src:license-check (141 packages loaded, 2696 targets configured)

Analyzing: target //src:license-check (144 packages loaded, 4585 targets configured)

Analyzing: target //src:license-check (144 packages loaded, 4585 targets configured)

Analyzing: target //src:license-check (145 packages loaded, 4709 targets configured)

INFO: Analyzed target //src:license-check (146 packages loaded, 4835 targets configured).
[13 / 16] JavaToolchainCompileClasses external/rules_java+/toolchains/platformclasspath_classes; 0s disk-cache, processwrapper-sandbox
[15 / 16] Building src/license.check.license_check.jar (); 0s disk-cache, multiplex-worker
INFO: Found 1 target...
Target //src:license.check.license_check up-to-date:
  bazel-bin/src/license.check.license_check
  bazel-bin/src/license.check.license_check.jar
INFO: Elapsed time: 23.852s, Critical Path: 2.32s
INFO: 16 processes: 12 internal, 3 processwrapper-sandbox, 1 worker.
INFO: Build completed successfully, 16 total actions
INFO: Running command line: bazel-bin/src/license.check.license_check src/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