[Portal] EIP-7702 Session Key Docs (.NET) (#7448)

Closes TOOL-4880

<!-- start pr-codex -->

---

## PR-Codex overview
This PR introduces new features and updates for the `EcosystemWallet` in the Thirdweb .NET SDK, focusing on EIP-7702 functionalities, including session management and permissions.

### Detailed summary
- Added new sidebar links for EIP-7702 actions.
- Updated `CreateSessionKey` function to include EIP-7702 functionalities.
- Introduced detailed documentation for new methods: `SignerHasFullPermissions`, `GetCallPoliciesForSigner`, `GetTransferPoliciesForSigner`, `GetSessionExpirationForSigner`, and `GetSessionStateForSigner`.
- Each method includes usage examples, parameter details, return values, and exception handling.

> ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}`

<!-- end pr-codex -->

<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

* **New Features**
  * Expanded sidebar navigation with new links for EIP-7702 session key actions under the wallet section.
  * Added documentation for EIP-7702 session key management, including creating session keys, checking signer permissions, retrieving call and transfer policies, session expiration, and session state.

* **Documentation**
  * Introduced detailed guides and usage examples for new EIP-7702 wallet session key features and related methods in the .NET SDK.
  * Clarified sidebar link names to distinguish between EIP-4337 and EIP-7702 session key creation.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: 0xFirekeeper

apps/portal/src/app/dotnet/sidebar.tsx

@@ -104,6 +104,30 @@ const walletActions: SidebarLink = (() => {
             href: `${parentSlug}/generateexternalloginlink`,
             name: "GenerateExternalLoginLink",
           },
+          {
+            href: `${parentSlug}/createsessionkey7702`,
+            name: "CreateSessionKey (EIP-7702)",
+          },
+          {
+            href: `${parentSlug}/signerhaspermissions7702`,
+            name: "SignerHasFullPermissions",
+          },
+          {
+            href: `${parentSlug}/getcallpolicies7702`,
+            name: "GetCallPoliciesForSigner",
+          },
+          {
+            href: `${parentSlug}/gettransferpolicies7702`,
+            name: "GetTransferPoliciesForSigner",
+          },
+          {
+            href: `${parentSlug}/getsessionexpiration7702`,
+            name: "GetSessionExpirationForSigner",
+          },
+          {
+            href: `${parentSlug}/getsessionstate7702`,
+            name: "GetSessionStateForSigner",
+          },
         ],
         name: "InAppWallet & EcosystemWallet",
       },
@@ -116,7 +140,7 @@ const walletActions: SidebarLink = (() => {
           },
           {
             href: `${parentSlug}/createsessionkey`,
-            name: "CreateSessionKey",
+            name: "CreateSessionKey (EIP-4337)",
           },
           {
             href: `${parentSlug}/addadmin`,