Added the doc for the table

docs/tables/azure_reservation_recommendation.md

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+# Table: azure_reservation_recommendation
+
+Azure Reservations help you save money by committing to one-year or three-year plans for multiple products. Committing allows you to get a discount on the resources you use. Reservations can significantly reduce your resource costs by up to 72% from pay-as-you-go prices. Reservations provide a billing discount and don't affect the runtime state of your resources. After you purchase a reservation, the discount automatically applies to matching resources.
+
+**Note:** We can filter out the recommendations by using the columns `look_back_period`, `resource_type` or `scope` values in the query parameter. By default the table returns the data of resource type `VirtualMachines` with the scope `Single` for the last seven days of usage to look back for recommendation.
+
+## Examples
+
+### Basic info
+
+```sql
+select
+  name,
+  id,
+  region,
+  scope,
+  etag,
+  type
+from
+  azure_reservation_recommendation;
+```
+
+### Get reservation recommendation details for the last 30 days
+
+```sql
+select
+  name,
+  tags,
+  sku,
+  look_back_period
+from
+  azure_reservation_recommendation
+where
+  look_back_period = 'Last30Days';
+```
+
+### List reservation recommendation of the resource type MySQL
+
+```sql
+select
+  name,
+  tags,
+  sku,
+  look_back_period,
+  resource_type
+from
+  azure_reservation_recommendation
+where
+  resource_type = 'MySQL';
+```
+
+### Get legacy resrvation recommendation properties
+
+```sql
+select
+  name,
+  id,
+  legacy_recommendation_properties ->> 'LookBackPeriod' as look_back_period,
+  legacy_recommendation_properties ->> 'InstanceFlexibilityRatio' as instance_flexibility_ratio,
+  legacy_recommendation_properties ->> 'InstanceFlexibilityGroup' as instance_flexibility_group,
+  legacy_recommendation_properties ->> 'NormalizedSize' as normalized_size,
+  legacy_recommendation_properties ->> 'RecommendedQuantityNormalized' as recommended_quantity_normalized,
+  legacy_recommendation_properties -> 'MeterID' as meter_id,
+  legacy_recommendation_properties ->> 'ResourceType' as resource_type,
+  legacy_recommendation_properties ->> 'Term' as term,
+  legacy_recommendation_properties -> 'CostWithNoReservedInstances' as cost_with_no_reserved_instances,
+  legacy_recommendation_properties -> 'RecommendedQuantity' as recommended_quantity,
+  legacy_recommendation_properties -> 'TotalCostWithReservedInstances' as total_cost_with_reserved_instances,
+  legacy_recommendation_properties -> 'NetSavings' as net_savings,
+  legacy_recommendation_properties ->> 'FirstUsageDate' as first_usage_date,
+  legacy_recommendation_properties ->> 'Scope' as scope,
+  legacy_recommendation_properties -> 'SkuProperties' as sku_properties
+from
+  azure_reservation_recommendation
+where
+  kind = 'legacy';
+```
+
+### Get modern resrvation recommendation properties
+
+```sql
+select
+  name,
+  id,
+  modern_recommendation_properties ->> 'Location' as location,
+  modern_recommendation_properties ->> 'LookBackPeriod' as look_back_period,
+  modern_recommendation_properties ->> 'InstanceFlexibilityRatio' as instance_flexibility_ratio,
+  modern_recommendation_properties ->> 'InstanceFlexibilityGroup' as instance_flexibility_group,
+  modern_recommendation_properties ->> 'NormalizedSize' as normalized_size,
+  modern_recommendation_properties ->> 'RecommendedQuantityNormalized' as recommended_quantity_normalized,
+  modern_recommendation_properties -> 'MeterID' as meter_id,
+  modern_recommendation_properties ->> 'ResourceType' as resource_type,
+  modern_recommendation_properties ->> 'Term' as term,
+  modern_recommendation_properties -> 'CostWithNoReservedInstances' as cost_with_no_reserved_instances,
+  modern_recommendation_properties -> 'RecommendedQuantity' as recommended_quantity,
+  modern_recommendation_properties -> 'TotalCostWithReservedInstances' as total_cost_with_reserved_instances,
+  modern_recommendation_properties -> 'NetSavings' as net_savings,
+  modern_recommendation_properties ->> 'FirstUsageDate' as first_usage_date,
+  modern_recommendation_properties ->> 'Scope' as scope,
+  modern_recommendation_properties -> 'SkuProperties' as sku_properties,
+  modern_recommendation_properties ->> 'SubscriptionID' as subscription_id,
+  modern_recommendation_properties ->> 'ResourceType' as resource_type,
+  modern_recommendation_properties ->> 'SkuName' as sku_name,
+from
+  azure_reservation_recommendation
+where
+  kind = 'modern';
+```