docs: update keywords for all packages (#2502)

Update keywords for all packages to make the easier to find

packages/ripple-address-codec/package.json

@@ -13,6 +13,12 @@
     "base-x": "^3.0.9",
     "create-hash": "^1.1.2"
   },
+  "keywords": [
+    "ripple",
+    "xrp",
+    "xrp ledger",
+    "xrpl"
+  ],
   "repository": {
     "type": "git",
     "url": "git@github.com:XRPLF/xrpl.js.git"

packages/ripple-binary-codec/package.json

@@ -25,6 +25,12 @@
     "test": "npm run build && jest --verbose false --silent=false ./test/*.test.js",
     "lint": "eslint . --ext .ts --ext .test.js"
   },
+  "keywords": [
+    "ripple",
+    "xrp",
+    "xrp ledger",
+    "xrpl"
+  ],
   "repository": {
     "type": "git",
     "url": "git@github.com:XRPLF/xrpl.js.git"

packages/ripple-keypairs/package.json

@@ -24,6 +24,12 @@
     "hash.js": "^1.0.3",
     "ripple-address-codec": "^4.3.1"
   },
+  "keywords": [
+    "ripple",
+    "xrp",
+    "xrp ledger",
+    "xrpl"
+  ],
   "repository": {
     "type": "git",
     "url": "git@github.com:XRPLF/xrpl.js.git"

packages/xrpl/package.json

@@ -80,6 +80,13 @@
     "url": "git@github.com:XRPLF/xrpl.js.git"
   },
   "readmeFilename": "README.md",
+  "keywords": [
+    "ripple-lib",
+    "ripple",
+    "xrp",
+    "xrp ledger",
+    "xrpl"
+  ],
   "engines": {
     "node": ">=10.13.0"
   }