Add default options parameters for session & transaction (#594)

## Usage and product changes
Adds default options parameters for functions to open a session or a
transaction.

## Implementation
Adds default options parameters for functions to open a session or a
transaction.

Author: krishnangovindraj

cpp/docs/connection/Driver.adoc

@@ -124,12 +124,12 @@ Checks whether this connection is presently open.
 .Returns
 `bool`
 
-[#_Session_TypeDBDriversession___const_stdstring__database__SessionType_sessionType__const_Options__options_]
+[#_Session_TypeDBDriversession___const_stdstring__database__SessionType_sessionType__const_Options__options__Options___]
 ==== session
 
 [source,cpp]
 ----
-Session TypeDB::Driver::session(const std::string& database, SessionType sessionType, const Options& options)
+Session TypeDB::Driver::session(const std::string& database, SessionType sessionType, const Options& options = Options())
 ----
 
 

cpp/docs/session/Session.adoc

@@ -111,12 +111,12 @@ a| `function` a| The callback function. a|
 .Returns
 `void`
 
-[#_Transaction_TypeDBSessiontransaction___TransactionType_type__const_Options__options___const]
+[#_Transaction_TypeDBSessiontransaction___TransactionType_type__const_Options__options__Options_____const]
 ==== transaction
 
 [source,cpp]
 ----
-Transaction TypeDB::Session::transaction(TransactionType type, const Options& options) const
+Transaction TypeDB::Session::transaction(TransactionType type, const Options& options = Options()) const
 ----
 
 

cpp/include/typedb/connection/driver.hpp

@@ -130,7 +130,7 @@ class Driver {
      * @param type The type of session to be created (DATA or SCHEMA)
      * @param options <code>TypeDBOptions</code> for the session
      */
-    Session session(const std::string& database, SessionType sessionType, const Options& options);
+    Session session(const std::string& database, SessionType sessionType, const Options& options = Options());
 
     /**
      * Returns the logged-in user for the connection. Only for TypeDB Cloud.

cpp/include/typedb/connection/session.hpp

@@ -98,7 +98,7 @@ class Session {
      * @param type The type of transaction to be created (READ or WRITE)
      * @param options Options for the session
      */
-    Transaction transaction(TransactionType type, const Options& options) const;
+    Transaction transaction(TransactionType type, const Options& options = Options()) const;
 
     /**
      * Registers a callback function which will be executed when this session is closed.