docs: restore missing RS roadmap translations to fix readme-sync

[bowenszhu]

The readme-sync check currently fails because the B601-RS roadmap has 12 rows in English but only 11 in the Chinese, Japanese, and French READMEs. This restores the missing Embodied Agent Architecture row in those three translations, bringing all 4 translations back into agreement with README.md.

The rows were originally added in

• update #84

They were lost when main was merged into the

• docs: restore fixes lost in a conflicted merge, and make CI watch main itself #80

branch at 00eccea. The incoming parent b641ed0 contains all 5 language versions; the merge result retains only English and Spanish.

This change restores the exact 3 original rows, including their completion statuses and documentation/source links. The diff is 3 added lines across README_zh.md, README_JP.md, and README_Fr.md.

The existing failure also appears on

• docs: restore D405/Gemini 305 design notes across README translations #86

its base and head both produce the same 3 row-count errors.

Validation performed locally:

• Before the fix: reproduced all three readme-sync row-count disagreements.
• python tools/check_readme_sync.py — passed: all 4 translations agree.
• python -m unittest discover -s tools/tests -v — all 9 tests passed.
• git diff --check — passed.

[Chirag6722]

Confirming from the other side: this is the PR that clears the readme-sync failure currently red on main (a row was added to the RS roadmap in English and not in the three translations). Both checks are green here, and the three files you touch are exactly the three the check names.

Worth merging this before #86 and #82 — both are red only because they inherit this failure, and both should go green on a rebase afterwards. Thanks for picking it up.