rename package from @push.rocks/npmextra to @push.rocks/smartconfig

- Rename all source files from npmextra.* to simpler names (classes.appdata.ts, etc.)
- Rename Npmextra class to Smartconfig
- Config file changed from npmextra.json to smartconfig.json
- KV store path changed from ~/.npmextra/kv to ~/.smartconfig/kv
- Update all imports, tests, and metadata

ts/paths.ts

@@ -0,0 +1,22 @@
+import * as plugins from './plugins.js';
+
+// directories
+export let cwd = process.cwd();
+export let packageDir = plugins.path.join(
+  plugins.smartpath.get.dirnameFromImportMetaUrl(import.meta.url),
+  '../',
+);
+
+// ----------------------
+// keyValueStore specific
+// ----------------------
+
+export let home = plugins.smartpath.get.home();
+
+/**
+ * keyValue base path
+ */
+export let kvUserHomeDirBase = plugins.path.join(home, '.smartconfig/kv');
+
+// files
+export let configFile = plugins.path.join(cwd, 'smartconfig.json');