feat(parsers/any): add any parser

src/parsers.ts

@@ -1,3 +1,4 @@
+export * from './parsers/any'
 export * from './parsers/defer'
 export * from './parsers/eof'
 export * from './parsers/eol'

src/parsers/any.ts

@@ -0,0 +1,24 @@
+import { type Parser } from '../state'
+
+export function any(): Parser<string> {
+  return {
+    parse(input, pos) {
+      if (input.length === pos) {
+        return {
+          isOk: false,
+          pos,
+          expected: 'reached the end of input'
+        }
+      }
+
+      const nextPos = pos + 1
+      const value = input.substring(pos, nextPos)
+
+      return {
+        isOk: true,
+        pos: nextPos,
+        value
+      }
+    }
+  }
+}