feat: Add Network Token API endpoints and related models

[armando-rodriguez-cko]

This pull request introduces support for Network Tokens in the Checkout SDK, along with enhancements to the Forward API. The changes include the addition of a NetworkTokenClient with various methods for managing network tokens, updates to the CheckoutApi interface and implementation to include the new client, and improvements to the Forward API with clearer documentation. Below is a summary of the most important changes grouped by theme:

Network Tokens Support

• Added NetworkTokenClient and INetworkTokenClient to manage network tokens, including methods to provision, retrieve, request cryptograms, and delete tokens. This includes detailed documentation for each method. ([[1]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-acbff404abb3c18bde06f8fed363130d5361c894efaa42a4fc378943730d2335R1-R59), [[2]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-d584ecc1d3a5841aaf3dbec6dcaecc259e38fe895999cda5ca0df93bdf536bc0R1-R108))
• Introduced new response models (Card, NetworkToken, NetworkTokenResponse, NetworkTokenByIdResponse) and enumerations (NetworkTokenType, StateType) to represent network token details. ([[1]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-5fc773f230794a4cbcbe179968decd3fdfa015a0bb668ebb6ad4eb99e0f256bdR1-R14), [[2]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-814597a22f0fd75e6aa28227910bc5ccabc8a9e91bd83007858b2ca8d97ed0c1R1-R45), [[3]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-c6452fd176e752bee7d2531513b1262d9b706611f520b2a75bba30904ab13018R1-R16), [[4]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-44ed0b26de198a5d2d59d5dd072b6c2da7f471627f245345fc0e8f739356dbddR1-R9), [[5]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-135c656e1bd85294a95569d5e9bdafcd65a2b9c8b56d58e4558196acbb02aa1fR1-R12), [[6]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-9522c5ddbca9378774385f2b1eb27252583a849076eb3291d23e508d5ddb2084R1-R22))
• Added request models for cryptograms and token deletion, including enumerations for deletion reasons (ReasonType) and initiators (InitiatedByType). ([[1]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-1511768ad8230041a3ef9f9f0066a92c0c0e672a6c5c5dd4dc2329ebb1a07530R1-R8), [[2]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-c9da9b2827e70b496a5211e9ec35d362942c9abc4d53d3b8ce131971549d26f0R1-R9), [[3]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-a090f5c5f7ee910c7f989cdb4e8ff3f2e908a46c0449e965770bda73b62025a2R1-R13), [[4]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-619bf9d664b2e7fbb4b5ce203e48d6882dcc79e399e30b63bf492661494eecb0R1-R14))

Integration with CheckoutApi

• Updated CheckoutApi and ICheckoutApi to include the NetworkTokenClient as a new dependency and exposed it via a NetworkTokenClient() method. ([[1]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-2ed32f167318b0497e1628526efe32b7fd2fb067c43a87d685ceee5aeac2803dR49), [[2]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-2ed32f167318b0497e1628526efe32b7fd2fb067c43a87d685ceee5aeac2803dR80), [[3]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-2ed32f167318b0497e1628526efe32b7fd2fb067c43a87d685ceee5aeac2803dR218-R223), [[4]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-82040b1a280ecee6b490283637ab28130670e02c1aa525fb3d65d5e474b31a29R69-R70))

Forward API Enhancements

• Added detailed XML documentation to ForwardClient and IForwardClient methods, improving clarity on the purpose and usage of the Forward API. ([[1]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-966b26144f734e0305d6f11ba080e85160d2a1c289858d13ccebd47a3a642617R20-R25), [[2]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-966b26144f734e0305d6f11ba080e85160d2a1c289858d13ccebd47a3a642617R38-R42), [[3]](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-4856e1390fa7d188aee257391b39c76ce14f99b3cc6a4bd5c96c917d341f247eR8-R24))

Miscellaneous

• Added a new method GetCryptogramLink() in the Resource class to retrieve cryptogram-related links. ([src/CheckoutSdk/Common/Resource.csR26-R30](https://github.com/checkout/checkout-sdk-net/pull/489/files#diff-fbb3b1d7cccd30c3cf2adb2f2a458b77bd8cfe808b3d1e3794c2f12d9b07f839R26-R30))

[sonarqubecloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud