Add "RESOURCES_WITH_TEMPLATES" to values.ts

`values.ts` sets up an enum for ease of registration in `package.json`.

Would be good to explore adding `RESOURCES_WITH_TEMPLATES` for ease of registering resources with templates.

```
export enum ContextValues {
// -- CONTEXT VALUES ONLY SET DURING EXTENSION ACTIVATION --
/** Array of resources that support the "View in CCloud" action. */
CCLOUD_RESOURCES = "confluent.ccloudResources",
/** Array of view IDs that contain Confluent/Kafka resources. */
VIEWS_WITH_RESOURCES = "confluent.viewsWithResources",
/** Array of resources that have an `id` property for enabling the `Copy ID` action. */
RESOURCES_WITH_ID = "confluent.resourcesWithIDs",
/** Array of resources that have a `name` property for enabling the `Copy Name` action. */
RESOURCES_WITH_NAMES = "confluent.resourcesWithNames",
/** Array of resources that have a `uri` property for enabling the `Copy URI` action. */
RESOURCES_WITH_URIS = "confluent.resourcesWithURIs",
/** Array of resources that can be selected for comparison and presented in a diff view. */
DIFFABLE_RESOURCES = "confluent.diffableResources",
```