chore: release Anvil 0.4.0, Lathe/Temper/Knurl 0.3.0, Planish/Braze/Ballast/Forge 0.2.0, Crucible/Weld 0.4.0

The producer-feedback round: stable note tracking, the NOTE pitch source with
Key lock and Follow bends, unsure-means-neutral fallbacks, Anvil's Enhance
mode, MAIN and ADVANCED pages, Ballast on Grid by default, and Crucible's
sure-note slice names with a song key.

Adds docs/pitch.md for the shared pitch source, updates every changed
plugin's README and changelog, the release table, the editor previews, the
website bullets, and the status in docs/ideas.md.

docs/weld/CHANGELOG.md

@@ -1,5 +1,12 @@
 # Weld changelog
 
+## 0.4.0
+
+- The editor opens on a MAIN page with Recovered, the band plot, Mode,
+  Response, Output and the time offset. **ADVANCED** in the header adds the
+  phase plot, Sections, Low, High and Gate. Sound and saved settings do not
+  change.
+
 ## 0.3.0
 
 - Show the **delay spread**: how much the alignment's group delay changes

docs/weld/README.md

@@ -1,7 +1,7 @@
 # Weld
 
 Weld fuses two bass layers so they add up instead of cancelling. Current version
-**0.3.0**.
+**0.4.0**.
 
 Bass patches are layered: a sub, one or more mid growls, a top. Where the layers
 overlap in the mids, they partly cancel. The causes are a polarity difference, a
@@ -37,6 +37,10 @@ plugins. Keep the font license with redistributed packages.
 
 ## Work with it
 
+The editor opens on the **MAIN** page: Recovered, the band plot, Mode,
+Response, Output and the time offset. The **ADVANCED** switch in the header adds
+the phase plot, Sections, Low, High and Gate.
+
 1. Leave **Mode** on **FOLLOW** and play the part where both layers sound. After
    a second or two, Weld shows its alignment: polarity, and the allpass sections
    with their frequency and Q.
@@ -47,7 +51,7 @@ plugins. Keep the font license with redistributed packages.
    - The upper plot shows each band against a perfectly aligned sum (0 dB). Red
      is what the unprocessed sum loses to cancellation; pink is the part Weld
      wins back. The white line is the level with Weld.
-   - The lower plot shows the phase of this layer against the other one, before
+   - On the ADVANCED page, the lower plot shows the phase of this layer against the other one, before
      (grey) and after (pink), and Weld's own phase curve (blue). After alignment
      the pink line sits near 0°.
    - **Delay spread** under the sections is how much Weld's delay changes