chore: make some packages private to prevent publish (#29542)

packages/base64/package.json

 {
 	"name": "@rocket.chat/base64",
+	"private": true,
 	"description": "Base64 encoding and decoding; Fork of Meteor's Base64 package",
 	"version": "1.0.12",
 	"main": "./dist/base64.js",

packages/fuselage-ui-kit/package.json

 {
   "name": "@rocket.chat/fuselage-ui-kit",
+  "private": true,
   "version": "0.31.16",
   "description": "UiKit elements for Rocket.Chat Apps built under Fuselage design system",
   "homepage": "https://rocketchat.github.io/Rocket.Chat.Fuselage/",

packages/random/package.json

 {
 	"name": "@rocket.chat/random",
+	"private": true,
 	"description": "Random number generator and utilities; Fork of Meteor's Random package",
 	"version": "1.2.1",
 	"main": "./dist/main.server.js",

packages/sha256/package.json

 {
 	"name": "@rocket.chat/sha256",
+	"private": true,
 	"description": "SHA256 implementation; Fork of Meteor's SHA256 package",
 	"version": "1.0.9",
 	"main": "./dist/sha256.js",