🫧 Tolk v1.4.x: internal progress and maintenance

Since the v1.4 release we've published Tolk v1.4.1 and v1.4.2.

Most of the work is not visible from the outside:
* tightening language semantics
* improving diagnostics
* handling weird edge cases discovered by fuzzing
* and keeping the whole toolchain aligned with ecosystem changes such as the TON → GRAM migration:

// before: 50000000 nanotons

val amount = ton("0.05");



// now: 50000000 nanograms

val amount = grams("0.05");

🛠️ Our new toolchain — Acton — has also reached several intermediate milestones. It now comes with improved external message testing, BoC contract support, library publishing safeguards, formatter and debugger improvements, and a broad documentation refresh.

🌳 This kind of work rarely makes headlines, but reliability is built exactly this way. Meanwhile, we are also working on a larger update that we'll share soon.