Implement basic functionality for StructToSchema

[edwardfeng-db]

Changes

• Baisc functionality for StructToSchema, everything is Optional now
• Need to do:
  • Implement equivalent for CustomizableSchema
  • Make tfsdk structs contain information about optional and computed
  • Handle recursive data types

Tests

• make test run locally
• relevant change in docs/ folder
• covered with integration tests in internal/acceptance
• relevant acceptance tests are passing
• using Go SDK

[tanmay-db]

Had some comments but core logic LGTM.

[tanmay-db]

should we also print the type as well here?

[tanmay-db]

This would also need to include aliases and tracking context that we currently have to typeToSchema for sdkv2?

Example -- we use tracking context for depth:

		if tc.depthExceeded(typeField) {
			// Skip the field if recursion depth is over the limit.
			log.Printf("[TRACE] over recursion limit, skipping field: %s, max depth: %d", getNameForType(typeField.Type), tc.getMaxDepthForTypeField(typeField))
			continue
		}

and aliases while getting field name:

fieldName := chooseFieldNameWithAliases(typeField, v.Type(), aliases)

[edwardfeng-db]

For tracking context yes, alias no.

Tracking context is coming up as the next step for recursion depth limit.

In the future all of alias information will go directly into the proto layer with annotations, so we don't have to worry about them in tf