feat(core): Introduce native implementations for Base64, random generation and normalization; remove runtime plugin dependencies; update tests, docs and package metadata

ts/smartstring.base64.ts

@@ -1,10 +1,89 @@
-import * as plugins from './smartstring.plugins.js';
-
 /**
  * the type for base 64
  */
 export type TStringInputType = 'string' | 'base64' | 'base64uri';
 
+/**
+ * Cross-platform base64 implementation
+ * Works in both Node.js and browser environments
+ */
+const universalBase64 = {
+  encode: (str: string): string => {
+    if (typeof Buffer !== 'undefined') {
+      // Node.js environment
+      return Buffer.from(str, 'utf8').toString('base64');
+    } else if (typeof btoa !== 'undefined') {
+      // Browser environment
+      // Handle Unicode properly
+      const utf8Bytes = new TextEncoder().encode(str);
+      const binaryString = Array.from(utf8Bytes, byte => String.fromCharCode(byte)).join('');
+      return btoa(binaryString);
+    } else {
+      // Fallback pure JS implementation
+      const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+      const bytes = new TextEncoder().encode(str);
+      let result = '';
+      let i = 0;
+      
+      while (i < bytes.length) {
+        const a = bytes[i++];
+        const b = i < bytes.length ? bytes[i++] : 0;
+        const c = i < bytes.length ? bytes[i++] : 0;
+        
+        const bitmap = (a << 16) | (b << 8) | c;
+        
+        result += chars.charAt((bitmap >> 18) & 63);
+        result += chars.charAt((bitmap >> 12) & 63);
+        result += i - 2 < bytes.length ? chars.charAt((bitmap >> 6) & 63) : '=';
+        result += i - 1 < bytes.length ? chars.charAt(bitmap & 63) : '=';
+      }
+      
+      return result;
+    }
+  },
+  
+  decode: (str: string): string => {
+    // Handle base64uri by converting back to standard base64
+    const base64String = str
+      .replace(/-/g, '+')
+      .replace(/_/g, '/')
+      .padEnd(str.length + ((4 - (str.length % 4)) % 4), '=');
+    
+    if (typeof Buffer !== 'undefined') {
+      // Node.js environment
+      return Buffer.from(base64String, 'base64').toString('utf8');
+    } else if (typeof atob !== 'undefined') {
+      // Browser environment
+      const binaryString = atob(base64String);
+      const bytes = new Uint8Array(binaryString.length);
+      for (let i = 0; i < binaryString.length; i++) {
+        bytes[i] = binaryString.charCodeAt(i);
+      }
+      return new TextDecoder().decode(bytes);
+    } else {
+      // Fallback pure JS implementation
+      const chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
+      let bytes: number[] = [];
+      let i = 0;
+      
+      while (i < base64String.length) {
+        const encoded1 = chars.indexOf(base64String.charAt(i++));
+        const encoded2 = chars.indexOf(base64String.charAt(i++));
+        const encoded3 = chars.indexOf(base64String.charAt(i++));
+        const encoded4 = chars.indexOf(base64String.charAt(i++));
+        
+        const bitmap = (encoded1 << 18) | (encoded2 << 12) | (encoded3 << 6) | encoded4;
+        
+        bytes.push((bitmap >> 16) & 255);
+        if (encoded3 !== 64) bytes.push((bitmap >> 8) & 255);
+        if (encoded4 !== 64) bytes.push(bitmap & 255);
+      }
+      
+      return new TextDecoder().decode(new Uint8Array(bytes));
+    }
+  }
+};
+
 /**
  * handle base64 strings
  */
@@ -50,21 +129,24 @@ export let base64 = {
    * encodes the string
    */
   encode: (stringArg: string) => {
-    return plugins.jsBase64.encode(stringArg);
+    return universalBase64.encode(stringArg);
   },
 
   /**
    * encodes a stringArg to base64 uri style
    */
   encodeUri: (stringArg: string) => {
-    return plugins.jsBase64.encodeURI(stringArg);
+    return universalBase64.encode(stringArg)
+      .replace(/\+/g, '-')
+      .replace(/\//g, '_')
+      .replace(/=/g, '');
   },
 
   /**
    * decodes a base64 encoded string
    */
   decode: (stringArg: string) => {
-    return plugins.jsBase64.decode(stringArg);
+    return universalBase64.decode(stringArg);
   },
 
   /**