feat(forge): add Forge tracked channel strip

One note tracker reads the input and Lathe, Temper and Knurl follow it as
modules, in any of six orders, each on or off. Every module gets the
tracker's events delayed by the latency of the modules in front of it.

- One module alone matches its standalone plugin sample for sample in
  every order.
- With Knurl's sub-octave pattern in front, Lathe in Forge follows the
  played note; a standalone Lathe after Knurl reads it an octave low.
- About 72 ms latency against about 206 ms for the three in a row.

The module pages reuse the standalone editors. Register Forge in the
catalog, CI, README, docs and website, and drop the built Ballast from
the site's idea list.

docs/development.md

@@ -25,8 +25,10 @@ Patina has `render` for offline WAV evaluation. The shared crates are:
 
 - `common-ui`: palette, embedded fonts, header, panels, knobs, meters.
 - `common-dsp`: filters, YIN pitch tracking, the note tracker used by Anvil,
-  Lathe, Temper, Knurl, Planish, Braze and Ballast, 4× oversampling (also Quench's),
-  BS.1770 K-weighting (Ballast), meters and WAV files.
+  Lathe, Temper, Knurl, Planish, Braze, Ballast and Forge (with the `Tracked`
+  module trait that lets Lathe, Temper and Knurl run behind one shared tracker),
+  4× oversampling (also Quench's), BS.1770 K-weighting (Ballast), meters and WAV
+  files.
 
 The wrappers stay separate workspaces, each with its own lockfile, so the
 NIH-plug Git dependency stays out of the root workspace. Host identities and
@@ -46,7 +48,7 @@ python3 -m unittest discover -s scripts/tests -v
 ```
 
 Products: `rivet`, `patina`, `anvil`, `crucible`, `lathe`, `temper`, `weld`,
-`knurl`, `planish`, `braze`, `quench`, `ballast`.
+`knurl`, `planish`, `braze`, `quench`, `ballast`, `forge`.
 
 `check-plugin.py` runs formatting, tests and clippy for one product's packages
 and its wrapper, without compiling the other products. Run it for every product
@@ -149,6 +151,7 @@ identify plugins by CLAP ID, so the vendor name does not affect saved projects.
 | Braze | (new) | `io.narl.bass-foundry.braze` |
 | Quench | (new) | `io.narl.bass-foundry.quench` |
 | Ballast | (new) | `io.narl.bass-foundry.ballast` |
+| Forge | (new) | `io.narl.bass-foundry.forge` |
 
 CLAP IDs use the form `io.narl.bass-foundry.<product>`. Builds tagged before
 this scheme used `io.storyboard.*` IDs; hosts treat the new IDs as different