Create .nycrc file for code coverage (Azure#26319)

This file will help us to publish the code coverage for rooms


### Packages impacted by this PR
Rooms Service

### Issues associated with this PR

none
### Describe the problem that is addressed by this PR
Rooms pipeline is not publishing code coverage

### What are the possible designs available to address the problem? If
there are more than one possible design, why was the one in this PR
chosen?


### Are there test cases added in this PR? _(If not, why?)_
not need

### Provide a list of related PRs _(if any)_


### Command used to generate this PR:**_(Applicable only to SDK release
request PRs)_

### Checklists
- [ ] Added impacted package name to the issue description
- [ ] Does this PR needs any fixes in the SDK Generator?** _(If so,
create an Issue in the
[Autorest/typescript](https://github.com/Azure/autorest.typescript)
repository and link it here)_
- [ ] Added a changelog (if necessary)

Author: paolamvhz

sdk/communication/communication-rooms/.nycrc

@@ -0,0 +1,10 @@
+{
+  "include": ["dist-esm/src/**/*.js"],
+  "exclude": ["**/*.d.ts", "dist-esm/src/generated/*"],
+  "reporter": ["text-summary", "html", "cobertura"],
+  "exclude-after-remap": false,
+  "sourceMap": true,
+  "produce-source-map": true,
+  "instrument": true,
+  "all": true
+}