docs: migrate ts_client detailed design from docs/features/time_slave

[ryan-steel]

Description

Migrates ts_client DD from old docs/features time_slave documentation to match the S-CORE folder layout. This treats ts_client as its own component since it has its own source subdir and is used by both time_daemon and time_slave.

Related ticket

Part of #97

[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]
Extracting Bazel installation...
Starting local Bazel server (8.6.0) and connecting to it...
INFO: Invocation ID: 4c1d1937-9dcf-4020-b5ce-5a435ac763b8
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
Loading: 
Loading: 3 packages loaded
Loading: 3 packages loaded
    currently loading: 
Loading: 3 packages loaded
    currently loading: 
Loading: 3 packages loaded
    currently loading: 
Loading: 3 packages loaded
    currently loading: 
Analyzing: target //:license-check (4 packages loaded)
Analyzing: target //:license-check (4 packages loaded, 0 targets configured)
Analyzing: target //:license-check (4 packages loaded, 0 targets configured)

Analyzing: target //:license-check (53 packages loaded, 10 targets configured)

Analyzing: target //:license-check (94 packages loaded, 25 targets configured)

Analyzing: target //:license-check (145 packages loaded, 2876 targets configured)

Analyzing: target //:license-check (159 packages loaded, 6206 targets configured)

Analyzing: target //:license-check (159 packages loaded, 6206 targets configured)

Analyzing: target //:license-check (164 packages loaded, 6255 targets configured)

Analyzing: target //:license-check (164 packages loaded, 6255 targets configured)

Analyzing: target //:license-check (167 packages loaded, 8142 targets configured)

Analyzing: target //:license-check (169 packages loaded, 8884 targets configured)

Analyzing: target //:license-check (170 packages loaded, 11342 targets configured)

Analyzing: target //:license-check (171 packages loaded, 11350 targets configured)

Analyzing: target //:license-check (171 packages loaded, 11350 targets configured)

Analyzing: target //:license-check (171 packages loaded, 11350 targets configured)

Analyzing: target //:license-check (171 packages loaded, 11350 targets configured)

INFO: Analyzed target //:license-check (172 packages loaded, 11476 targets configured).
INFO: From Generating Dash formatted dependency file ...:
INFO: Successfully converted 2 packages from Cargo.lock to bazel-out/k8-fastbuild/bin/formatted.txt
[14 / 16] [Prepa] JavaToolchainCompileBootClasspath external/rules_java+/toolchains/platformclasspath.jar
[15 / 16] Building license.check.license_check.jar (); 0s disk-cache, multiplex-worker
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: 33.012s, Critical Path: 2.53s
INFO: 16 processes: 12 internal, 3 processwrapper-sandbox, 1 worker.
INFO: Build completed successfully, 16 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

[BjoernAtBosch]

LGTM