Update next-template defaults & Biome config

Improve runtime defaults for create-sei's Next.js template and update Biome settings. Add a .changeset for a patch release.

Changes include:
- .env.example: clarify default chain behavior and example override (testnet).
- biome.json: include *.json and *.md in includes and add ignore patterns (node_modules, dist, .next, .yarn).
- Template adjustments: add a prebuild Biome check and include Biome in devDependencies; configure Next.js to allow Sei CDN images and skip ESLint during builds; update provider/shell setup and template docs/configs (README, Tailwind v4 config).

These updates align the template with current defaults and improve developer/runtime experience.

Author: codebycarson

.changeset/some-bags-tie.md

@@ -0,0 +1,10 @@
+---
+"@sei-js/create-sei": patch
+---
+
+Improve the `next-template` runtime defaults generated by `create-sei`.
+
+- Add a `prebuild` Biome check and include Biome in template dev dependencies.
+- Configure Next.js to allow Sei CDN images and skip ESLint during builds.
+- Update provider and shell setup for improved chain/image handling.
+- Align template config/docs with current defaults (`.env.example`, `README`, Biome, Tailwind v4 config).

packages/create-sei/templates/next-template/.env.example

@@ -1,6 +1,6 @@
 # Chain configuration
 # Options: mainnet, testnet, devnet
-# Defaults to mainnet if not set
+# Defaults to mainnet if not set; this example overrides it to testnet
 NEXT_PUBLIC_CHAIN=testnet
 
 # WalletConnect Project ID (optional)

packages/create-sei/templates/next-template/biome.json

@@ -50,6 +50,7 @@
 		}
 	},
 	"files": {
-		"includes": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.css"]
+		"includes": ["src/**/*.ts", "src/**/*.tsx", "src/**/*.css", "*.json", "*.md"],
+		"ignore": ["node_modules/**", "dist/**", ".next/**", ".yarn/**"]
 	}
 }