Bloom commands (#1786)

* ft.alter

* bloom commands

* tdigest

* delete tdigest

* uncomment tests

* small changes

* Update MADD.ts

* small changes

* clean code

* Update README.md

* Update README.md

Co-authored-by: leibale <leibale1998@gmail.com>

packages/bloom/lib/commands/count-min-sketch/MERGE.ts

@@ -0,0 +1,37 @@
+export const FIRST_KEY_INDEX = 1;
+
+interface Sketch {
+    name: string;
+    weight: number;
+}
+
+type Sketches = Array<string> | Array<Sketch>;
+
+export function transformArguments(dest: string, src: Sketches): Array<string> {
+    const args = [
+        'CMS.MERGE',
+        dest,
+        src.length.toString()
+    ];
+
+    if (isStringSketches(src)) {
+        args.push(...src);
+    } else {
+        for (const sketch of src) {
+            args.push(sketch.name);
+        }
+
+        args.push('WEIGHTS');
+        for (const sketch of src) {
+            args.push(sketch.weight.toString());
+        }
+    }
+
+    return args;
+}
+
+function isStringSketches(src: Sketches): src is Array<string> {
+    return typeof src[0] === 'string';
+}
+
+export declare function transformReply(): 'OK';