Migrate ts client detailed design to doxygen

[ryan-steel]

Description

Migrates the detailed design docs to doxygen to match process description guidelines which state that detailed design documentation belongs in code rather than separate design artifacts.

Most of this is removal of unnecessary implementation reqs from the detailed design, and updating doxygen comments.

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: a26dd709-0ae9-4813-8044-eeff6a319afc
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
WARNING: For repository 'platforms', the root module requires module version platforms@1.0.0, but got platforms@1.1.0 in the resolved dependency graph. Please update the version in your MODULE.bazel or set --check_direct_dependencies=off
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
Computing main repo mapping: 
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
Analyzing: target //:license-check (4 packages loaded, 0 targets configured)
Analyzing: target //:license-check (4 packages loaded, 0 targets configured)

Analyzing: target //:license-check (72 packages loaded, 10 targets configured)

Analyzing: target //:license-check (109 packages loaded, 218 targets configured)

Analyzing: target //:license-check (151 packages loaded, 3143 targets configured)

Analyzing: target //:license-check (164 packages loaded, 6259 targets configured)

Analyzing: target //:license-check (169 packages loaded, 6308 targets configured)

Analyzing: target //:license-check (169 packages loaded, 6308 targets configured)

Analyzing: target //:license-check (169 packages loaded, 6308 targets configured)

Analyzing: target //:license-check (172 packages loaded, 8195 targets configured)

Analyzing: target //:license-check (174 packages loaded, 11401 targets configured)

Analyzing: target //:license-check (175 packages loaded, 11421 targets configured)

Analyzing: target //:license-check (176 packages loaded, 11429 targets configured)

Analyzing: target //:license-check (176 packages loaded, 11429 targets configured)

INFO: Analyzed target //:license-check (177 packages loaded, 11555 targets configured).
[12 / 16] checking cached actions
INFO: From Generating Dash formatted dependency file ...:
INFO: Successfully converted 2 packages from Cargo.lock to bazel-out/k8-fastbuild/bin/formatted.txt
[13 / 16] JavaToolchainCompileClasses external/rules_java+/toolchains/platformclasspath_classes; 0s disk-cache, processwrapper-sandbox
[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: 35.021s, Critical Path: 2.47s
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>]