docs(facade): Improves facade docs.

Author: ryasmi

docs/facade.md

@@ -0,0 +1,80 @@
+# Facade
+
+- [countEntities](#countentities)
+- [createEntity](#createentity)
+- [getEntities](#getentities)
+- [getEntity](#getentity)
+- [overwriteEntity](#overwriteentity)
+- [patchEntity](#patchentity)
+- [removeEntities](#removeentities)
+- [removeEntity](#removeentity)
+
+### countEntities
+```ts
+const { count } = await facade.countEntities({
+  filter: { foo: 'bar' },
+});
+```
+
+### createEntity
+```ts
+const { entity } = await facade.createEntity({
+  entity: { id: 'example_id', foo: 'bar' },
+});
+```
+
+### getEntities
+```ts
+const { entities, nextCursor, previousCursor } = await facade.getEntities({
+  filter: { foo: 'bar' },
+  sort: { id: true },
+  pagination: { limit: 10, forward: true, cursor: undefined },
+});
+const secondPage = await facade.getEntities({
+  filter: { foo: 'bar' },
+  sort: { id: true },
+  pagination: { limit: 10, forward: true, cursor: nextCursor },
+});
+const firstPage = await facade.getEntities({
+  filter: { foo: 'bar' },
+  sort: { id: true },
+  pagination: { limit: 10, forward: false, cursor: secondPage.previousCursor },
+});
+```
+
+### getEntity
+```ts
+const { entity } = await facade.getEntity({
+  id: { id: 'example_id' },
+});
+```
+
+### overwriteEntity
+```ts
+const { entity } = await facade.overwriteEntity({
+  id: { id: 'example_id' },
+  entity: { id: 'example_id', foo: 'bar' },
+});
+```
+
+### patchEntity
+```ts
+const { entity } = await facade.patchEntity({
+  id: { id: 'example_id' },
+  patch: { foo: 'bar' },
+});
+```
+
+### removeEntities
+```ts
+await facade.removeEntities({
+  filter: { foo: 'bar' },
+});
+```
+
+### removeEntity
+```ts
+await facade.removeEntity({
+  id: { id: 'example_id' },
+});
+```