feat: adopt the template's branding toolkit

Replaces the single check-branding.sh with the four-file toolkit from
musiikki/nih-plug-template, moved under tools/ alongside where the deploy
scripts will eventually live.

The two scripts are byte-identical to the template's; everything specific
to this plugin lives in tools/branding.conf and tools/branding-sites.tsv.
That is the point of the split: syncing an improvement is now a file copy
rather than a shell merge, which is what the last two syncs had become.

This repo's data differs from the template's in ways that exercise the
design rather than fight it: params live in src/params.rs rather than
src/lib.rs, deploy.ps1 exists so its three rows check instead of skip, and
the CI bundle command carries no --features flag because VST3 is always on
here. All of that is table data now, not forked shell.

Nothing needed overriding: PKG, STRUCT and PARAMS_STRUCT all derive
correctly from PLUGIN_NAME ("Bari 206" -> bari_206 / Bari206 /
Bari206Params). AUTHOR is pinned because this plugin separates the person
who wrote it from the organisation that vends it — a distinction the
template could not express until integrating here surfaced it.

Adopting it required two upstream fixes, both made in the template first
so the scripts stay identical: cargo AUTHOR as a value distinct from
Plugin::VENDOR, and site patterns narrowed to the smallest distinctive
fragment after this repo's rustfmt-wrapped CLAP_DESCRIPTION proved a
statement-spanning pattern cannot match correctly formatted source.

CI is repointed at tools/check-branding.sh, and its path filter widened to
tools/** — the old filter named a file that no longer exists, so a change
to the toolkit would have triggered no CI at all.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WHt4DykxXaQnyaJfyS8KCn

tools/branding-sites.tsv

@@ -0,0 +1,29 @@
+req	pkg.cargo	Cargo.toml	name = "bari_206"
+req	pkg.bundler	bundler.toml	[bari_206]
+opt	pkg.lock	Cargo.lock	name = "bari_206"
+opt	pkg.ci	.github/workflows/ci.yaml	cargo xtask bundle bari_206
+opt	pkg.readme	README.md	cargo xtask bundle bari_206
+req	display.bundler	bundler.toml	name = "Bari 206"
+opt	display.notice	NOTICE	Bari 206
+req	name.plugin	src/lib.rs	const NAME: &'static str = "Bari 206"
+req	vendor.plugin	src/lib.rs	const VENDOR: &'static str = "Novoyuuparosk"
+req	email.plugin	src/lib.rs	const EMAIL: &'static str = "mikkeli@novoyuuparosk.org"
+req	authors.cargo	Cargo.toml	authors = ["Mikkeli Matlock <mikkeli@novoyuuparosk.org>"]
+req	homepage.cargo	Cargo.toml	homepage = "https://github.com/mikkeli/codename-206"
+req	url.plugin	src/lib.rs	const URL: &'static str = env!("CARGO_PKG_HOMEPAGE")
+req	description.cargo	Cargo.toml	description = "A VST3/CLAP multiband compressor/limiter with a custom gain-curve display"
+req	description.clap	src/lib.rs	Some("Multiband compressor/limiter (stage 3: 3-band + 'All' channel)")
+req	clapid.plugin	src/lib.rs	const CLAP_ID: &'static str = "org.novoyuuparosk.bari-206"
+req	vst3id.plugin	src/lib.rs	const VST3_CLASS_ID: [u8; 16] = *b"Bari206Multiband"
+req	struct.def	src/lib.rs	struct Bari206 {
+req	struct.plugin	src/lib.rs	impl Plugin for Bari206 {
+req	struct.clap	src/lib.rs	impl ClapPlugin for Bari206 {
+req	struct.vst3	src/lib.rs	impl Vst3Plugin for Bari206 {
+req	struct.exportclap	src/lib.rs	nih_export_clap!(Bari206);
+req	struct.exportvst3	src/lib.rs	nih_export_vst3!(Bari206);
+req	params.def	src/params.rs	struct Bari206Params {
+req	params.default	src/params.rs	impl Default for Bari206Params {
+req	params.field	src/lib.rs	params: Arc<Bari206Params>,
+opt	deploy.pkg	deploy.ps1	$Package = "bari_206"
+opt	deploy.vst3	deploy.ps1	$vst3Name = "Bari 206.vst3"
+opt	deploy.clap	deploy.ps1	$clapName = "Bari 206.clap"