fix: logo 右半部分从 CODING 改为 CODE

去掉难以正确渲染的 N 和 G 字母，右半部分简化为 CODE（4 字母），
与左半部分 AIR 组合为 AIR CODE。

packages/core/src/filesystem/schema.ts

@@ -0,0 +1,23 @@
+import { Schema } from "effect"
+import { NonNegativeInt, PositiveInt, RelativePath } from "../schema"
+
+export class Entry extends Schema.Class<Entry>("FileSystem.Entry")({
+  path: RelativePath,
+  type: Schema.Literals(["file", "directory"]),
+  mime: Schema.String,
+}) {}
+
+export const Submatch = Schema.Struct({
+  text: Schema.String,
+  start: NonNegativeInt,
+  end: NonNegativeInt,
+})
+export type Submatch = typeof Submatch.Type
+
+export class Match extends Schema.Class<Match>("FileSystem.Match")({
+  entry: Entry,
+  line: PositiveInt,
+  offset: NonNegativeInt,
+  text: Schema.String,
+  submatches: Schema.Array(Submatch),
+}) {}