feat: implement ERC-6909 multi-token standard (continuation of #1040)

CHANGELOG.md

@@ -9,6 +9,19 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## Unreleased
 
+### Added
+
+- ERC-6909 standard implementation and extensions (#1594)
+  - Added `ERC6909Component`, `ERC6909ContentURIComponent`, `ERC6909MetadataComponent`, and `ERC6909TokenSupplyComponent`.
+  - Added interfaces and ABI traits: `IERC6909`, `ERC6909ABI`, `IERC6909Metadata`, `ERC6909MetadataABI`, `IERC6909TokenSupply`, `ERC6909TokenSupplyABI`, `IERC6909ContentUri`, and `IERC6909ContentUriABI`.
+  - Added mocks: `ERC6909Mock`, `ERC6909MockWithHooks`, `ERC6909ContentURIMock`, `ERC6909MetadataMock`, `ERC6909TokenSupplyMock`.
+  - Added tests for components.
+
+- Integration of ERC-6909 components into the `with_components` macro (#1594)
+  - Added `ComponentInfo` implementations for ERC-6909 and its extensions.
+  - Added new diagnostic `ERC6909_HOOKS_IMPL_MISSING`.
+  - Added parser validation for missing hooks implementations.
+
 ## 3.0.0-alpha.3 (2025-10-9)
 
 ### Added

docs/antora.yml

@@ -5,4 +5,4 @@ nav:
   - modules/ROOT/nav.adoc
 asciidoc:
   attributes:
-    page-sidebar-collapse-default: 'Access,Accounts,Finance,Governance,Introspection,Security,ERC20,ERC721,ERC1155,ERC4626,Upgrades,Universal Deployer Contract'
+    page-sidebar-collapse-default: 'Access,Accounts,Finance,Governance,Introspection,Security,ERC20,ERC721,ERC1155,ERC4626,ERC6909,Upgrades,Universal Deployer Contract'

docs/modules/ROOT/nav.adoc

@@ -53,6 +53,8 @@
 **** xref:/api/erc1155.adoc[API Reference]
 *** xref:erc4626.adoc[ERC4626]
 **** xref:/api/erc20.adoc#ERC4626Component[API Reference]
+*** xref:erc6909.adoc[ERC6909]
+**** xref:/api/erc6909.adoc[API Reference]
 *** xref:/api/token_common.adoc[Common]
 
 ** xref:udc.adoc[Universal Deployer Contract]