Scaffold NIH-plug project: full-band gain VST3/CLAP with one-slider egui GUI

Sets up the Rust/NIH-plug build (pinned to nih-plug rev f36931f) producing
VST3 and CLAP bundles via 'cargo xtask bundle'. Implements the first landmark:
a full-band gain plugin with a single egui ParamSlider.

- Cargo workspace + xtask bundler, .cargo alias, bundler.toml
- src/lib.rs: Codename206 plugin (gain param, egui editor)
- deploy.ps1/.bat: build + install to system VST3/CLAP folders (real copy,
  not a junction, for FL Studio); -User flag for a no-admin dev loop
- LICENSE: GPL-3.0 (required by NIH-plug's VST3 bindings)
- README: corrected architecture for the 'All' aggregate channel (4th comp/lim
  stack on the summed bands; all-bands-bypassed = simple full-band comp)
- .gitignore excludes /target and the local nih-plug + _template reference clones

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Cargo.toml

@@ -0,0 +1,33 @@
+[package]
+name = "codename_206"
+version = "0.1.0"
+edition = "2021"
+authors = ["Mikkeli Matlock <matlockib@gmail.com>"]
+homepage = "https://github.com/mikkeli/codename-206"
+description = "A VST3/CLAP multiband compressor/limiter with a custom gain-curve display"
+# VST3 is on by default in nih_plug, and its bindings (vst3-sys) are GPLv3. Any
+# distributed VST3 binary built with them must therefore be GPL-3.0-or-later
+# (or covered by a commercial Steinberg licence). CLAP carries no such requirement.
+license = "GPL-3.0-or-later"
+
+[workspace]
+members = ["xtask"]
+
+[lib]
+crate-type = ["cdylib"]
+
+[dependencies]
+# Pinned to the exact commit of the local ./nih-plug reference clone so the build
+# is reproducible and matches the examples we read from. Bump the `rev` together
+# with `git -C nih-plug pull` when you want to update.
+nih_plug = { git = "https://github.com/robbert-vdh/nih-plug.git", rev = "f36931f7af4646065488a9845d8f8c2f95252c23", features = ["assert_process_allocs"] }
+nih_plug_egui = { git = "https://github.com/robbert-vdh/nih-plug.git", rev = "f36931f7af4646065488a9845d8f8c2f95252c23" }
+
+[profile.release]
+lto = "thin"
+strip = "symbols"
+
+[profile.profiling]
+inherits = "release"
+debug = true
+strip = "none"