Remove vault docs for now, move them to other primitives

Author: greimela

docs/sdk/index.md

@@ -165,7 +165,6 @@ The SDK is organized around these key abstractions:
 - [Standard (XCH)](/sdk/primitives/standard) - Working with basic XCH coins
 - [CAT](/sdk/primitives/cat) - Issuing and spending custom asset tokens
 - [NFT](/sdk/primitives/nft) - Minting and transferring NFTs
-- [Vault](/sdk/primitives/vault) - Multi-signature custody
 
 ## Relationship to chia-rs
 

docs/sdk/primitives/other.md

@@ -5,7 +5,41 @@ title: Other Primitives
 
 # Other Primitives
 
-The SDK includes several additional primitives beyond the core CAT, NFT, and Vault types. This page provides brief overviews of these primitives.
+The SDK includes several additional primitives beyond the core CAT and NFT types. This page provides brief overviews of these primitives.
+
+## Vault
+
+Vaults provide multi-signature custody for Chia assets. They enable secure storage patterns where multiple parties or conditions must be satisfied to spend funds.
+
+```rust
+use chia_wallet_sdk::prelude::*;
+
+// Vault structure
+let vault = Vault {
+    coin,
+    launcher_id,
+    proof,
+    custody_hash,  // Defines spending requirements
+};
+
+// Spend a vault with a MIPS (Multi-Input Puzzle Spend)
+vault.spend(ctx, &mips_spend)?;
+
+// Compute the child vault after a spend
+let child_vault = vault.child(new_custody_hash, new_amount);
+```
+
+For vault internals and specification, see [CHIP-0043 (MIPS)](https://github.com/Chia-Network/chips/blob/main/CHIPs/chip-0043.md).
+
+**Use cases:**
+- Multi-signature wallets requiring M-of-N approval
+- Time-locked custody arrangements
+- Institutional custody solutions
+- Escrow patterns
+
+For the complete API, see [Vault in docs.rs](https://docs.rs/chia-sdk-driver/latest/chia_sdk_driver/struct.Vault.html).
+
+---
 
 ## DID (Decentralized Identifiers)
 

docs/sdk/primitives/vault.md

@@ -26,7 +26,6 @@ const sidebars: SidebarsConfig = {
             { type: "doc", id: "sdk/primitives/standard", label: "Standard (XCH)" },
             { type: "doc", id: "sdk/primitives/cat", label: "CAT" },
             { type: "doc", id: "sdk/primitives/nft", label: "NFT" },
-            { type: "doc", id: "sdk/primitives/vault", label: "Vault" },
             { type: "doc", id: "sdk/primitives/other", label: "Other Primitives" },
           ],
         },