chore: rework plugin readmes, json changelogs and standalone repo setup

plugins/snippets/CHANGELOG.json

@@ -0,0 +1,34 @@
+{
+  "$schema": "https://raw.githubusercontent.com/Termix-SSH/Termix/main/packages/plugin-sdk/schema/changelog.schema.json",
+  "releases": [
+    {
+      "version": "1.0.0",
+      "changes": [
+        {
+          "type": "added",
+          "text": "Save commands and notes in folders"
+        },
+        {
+          "type": "added",
+          "text": "Run them in one or more terminals, or straight on a set of hosts"
+        },
+        {
+          "type": "added",
+          "text": "Variables for the host and your own inputs"
+        },
+        {
+          "type": "added",
+          "text": "Run a snippet each time you connect to a host"
+        },
+        {
+          "type": "added",
+          "text": "Share snippets with users or roles"
+        },
+        {
+          "type": "added",
+          "text": "Import and export as JSON"
+        }
+      ]
+    }
+  ]
+}