feat: javascript helpers extension

[alandefreitas]

Fixes #881, moves us closer on #1113.

• Swapped Duktape for JerryScript across CMake, CI, presets, bootstrap recipe, and the install
  docs; added a small port layer so it all hooks up cleanly.
• Tightened the JS helper runtime: shared context lifetime, safer value accessors, clearer errors,
  and helper registration that keeps options/hash intact for block helpers; added unit tests to cover
  the new paths.
• Added an addons-supplemental config option so you can layer extra addons/overrides; documented it and
  dropped in golden fixtures for the JS helpers. Also cleaned up the TestRunner include path.

[github-actions]

🚧 Danger.js checks for MrDocs are experimental; expect some rough edges while we tune the rules.

⚠️ Warnings

Warning

Commit db51f18 (feat: javascript helpers extension) changes 3164 source lines. Consider splitting it into smaller, reviewable chunks.

✨ Highlights

• 🧪 Existing golden tests changed (behavior likely shifted)

🧾 Changes by Scope

Scope	Lines Δ	Lines +	Lines -	Files Δ	Files +	Files ~	Files ↔	Files -
Source	3164	1254	1910	-5	-	6	-	11
Tests	531	417	114	3	1	2	-	-
Golden Tests	496	496	-	41	22	-	19	-
Third-party	271	131	140	-	3	-	-	3
CI / Roadmap	195	152	43	9	1	8	-	-
Docs	112	34	78	3	-	3	-	-
Build / Toolchain	34	20	14	3	-	3	-	-
Other	24	2	22	-	-	1	-	1
Total	4827	2506	2321	54	27	23	19	15

Legend: Files + (added), Files ~ (modified), Files ↔ (renamed), Files - (removed)

🔝 Top Files

• src/lib/Support/JavaScript.cpp (Source): 2641 lines Δ (+951 / -1690)
• src/test/Support/JavaScript.cpp (Tests): 453 lines Δ (+341 / -112)
• src/lib/Gen/hbs/Builder.cpp (Source): 283 lines Δ (+187 / -96)

Generated by 🚫 dangerJS against db51f18

[cppalliance-bot]

An automated preview of the documentation is available at https://1126.mrdocs.prtest2.cppalliance.org/index.html

If more commits are pushed to the pull request, the docs will rebuild at the same URL.

2025-12-09 06:21:45 UTC