chore: move biome config to biome.jsonc and baseline existing violations

biome.json is strict JSON; the jsonc extension allows the annotations
on the baseline entries. Rules that currently fail are downgraded to
warn with a note against issue #421 — restore each to error as its
occurrences are fixed. files.experimentalScannerIgnores keeps the
scanner out of .worktrees/ so a local worktree's own config can't
conflict with the root one.

Also fixes the handful of auto-fixable errors (unused imports in docs/
and landing/, @ts-expect-error over @ts-ignore). bun run lint is now
green: 0 errors, 96 warnings visible as debt.

landing/src/app/token/page.tsx

@@ -1,10 +1,7 @@
 import {
-	ArrowUpRight,
 	Check,
 	Cloud,
-	Flame,
 	Heart,
-	Lock,
 	Rocket,
 	ShieldCheck,
 } from "lucide-react";
@@ -14,8 +11,6 @@ import {Navbar} from "@/components/Navbar";
 import {TokenSection} from "@/components/TokenSection";
 import {TokenStatsSection} from "@/components/TokenStats";
 import {
-	TOKEN_PROOFS,
-	TOKEN_SOLSCAN_URL,
 	TOKEN_TICKER,
 } from "@/lib/constants";
 

landing/src/components/SupportedModels.tsx

@@ -6,7 +6,6 @@ import {
   Languages,
   type LucideIcon,
   MessageSquare,
-  Mic2,
   SlidersHorizontal,
   Sparkles,
   Volume2,

landing/src/lib/token-stats.ts

@@ -9,7 +9,6 @@
 //     for price — nothing is asserted that can't be verified on Solscan.
 
 import {
-  TOKEN_BURN_ADDRESS,
   TOKEN_CONTRACT_ADDRESS,
   TOKEN_CREATOR_ADDRESS,
   TOKEN_DEV_WALLETS,