feat(docs): add setAllowedExecutor function details for minting tags (#1352)

Author: fassko

docs/fassets/03-direct-minting.mdx

@@ -72,15 +72,15 @@ The `MintingTagManager` contract on Flare manages the reservation and ownership
 - Tags are assigned sequentially.
   The user always receives the next available tag.
 - The contract implements the **ERC-721** (NFT) interface, so reserved tags can be transferred or resold.
-- Tag owners can set a preferred executor with `setAllowedExecutor`.
+- Tag owners can set a preferred executor with [`setAllowedExecutor`](/fassets/reference/IMintingTagManager#setallowedexecutor).
   Executor changes are not immediate: the new executor becomes active after a 10-minute cooldown to protect in-flight FDC proofs.
 - On initial reservation and tag transfer, the recipient resets to the new owner and the executor resets to the zero address.
 
 ## Executor Restrictions
 
 Executors can be restricted in three ways depending on the minting method:
 
-1. **Tag-based:** The tag manager's `setAllowedExecutor` method defines the allowed executor.
+1. **Tag-based:** The tag manager's [`setAllowedExecutor`](/fassets/reference/IMintingTagManager#setallowedexecutor) method defines the allowed executor.
    If set to the zero address, anyone can execute.
 2. **Memo-based:** The 48-byte memo format encodes the executor address directly.
    The 32-byte memo format does not specify an executor, so anyone can execute.

docs/fassets/developer-guides/6-fassets-direct-minting-tag.mdx

@@ -24,7 +24,7 @@ Compared to the [memo-based direct minting](/fassets/developer-guides/fassets-di
 - **One-time setup**: reserve a tag once via [`MintingTagManager`](/fassets/reference/IMintingTagManager) — pay the [`reservationFee`](/fassets/reference/IMintingTagManager#reservationfee) in native token and bind the recipient with [`setMintingRecipient`](/fassets/reference/IMintingTagManager#setmintingrecipient).
 - **Reusable**: every subsequent XRPL payment with the same destination tag routes to the bound recipient without rebuilding a memo.
 - **Transferable**: tags are [ERC-721 NFTs](https://ethereum.org/developers/docs/standards/tokens/erc-721/) and can be transferred to another owner with [`transfer`](/fassets/reference/IMintingTagManager#transfer).
-- **Optional preferred executor**: the tag owner may restrict execution via `setAllowedExecutor`.
+- **Optional preferred executor**: the tag owner may restrict execution via [`setAllowedExecutor`](/fassets/reference/IMintingTagManager#setallowedexecutor).
   After [`othersCanExecuteAfterSeconds`](/fassets/reference/IAssetManager#getdirectmintingotherscanexecuteafterseconds), anyone can finalize.
 
 ## Prerequisites
@@ -72,7 +72,7 @@ Compared to the [memo-based direct minting](/fassets/developer-guides/fassets-di
 - **Reservations cost native currency.**
   Tag reservation pays a fee in native token.
   Tags are assigned sequentially.
-- **Executor changes are not immediate.** After calling the `setAllowedExecutor` function, the new executor only becomes active after a 10-minute cooldown to protect in-flight FDC proofs.
+- **Executor changes are not immediate.** After calling the [`setAllowedExecutor`](/fassets/reference/IMintingTagManager#setallowedexecutor) function, the new executor only becomes active after a 10-minute cooldown to protect in-flight FDC proofs.
   See [Executor Restrictions](/fassets/direct-minting#executor-restrictions).
 - **Transferring a tag resets it.**
   When ownership changes, the recipient is reset to the new owner, and the executor is reset to the zero address.

docs/fassets/reference/IMintingTagManager.mdx

@@ -120,3 +120,20 @@ function allowedExecutor(uint256 _mintingTag) external view returns (address);
 #### Returns
 
 - The address of the allowed executor, or `address(0)` if none is set.
+
+### `setAllowedExecutor`
+
+Set the allowed executor for a tag.
+Only callable by the tag owner.
+The allowed executor is the only address that can execute direct mintings with this tag.
+Setting an allowed executor is optional; if not set, anyone can execute mintings with the tag.
+Changes to the allowed executor are subject to a cooldown delay before they become active.
+
+```solidity
+function setAllowedExecutor(uint256 _mintingTag, address _executor) external;
+```
+
+#### Parameters
+
+- `_mintingTag`: The minting tag ID.
+- `_executor`: The new allowed executor address (must not be the zero address).