Added extensions section (#107)

* update graphics

* add profile tag info

* added extension page

* add strategy flow graphic

Author: MasterHW

pages/strategies/_meta.json

@@ -13,6 +13,9 @@
 	"distribution":{
 		"title": "Distribution"
 	},
+	"extensions":{
+		"title": "Extensions"
+	},
 	"guides": {
 		"type": "separator",
 		"title": "Guides",

pages/strategies/extensions.md

@@ -0,0 +1,28 @@
+# Extensions
+
+Beginning in Allo v2.1, strategies make use of modular components.
+This composability rapidly speeds up dev time and enhances security
+for many common design patterns.
+
+Some of the provided extensions are good examples of how extensions can
+be useful:
+
+* [Gating](https://github.com/allo-protocol/allo-v2.1/tree/dev/contracts/strategies/extensions/gating): 
+    Provides gating mechanisms to restrict access to certain actions or features based on various conditions, such as token holdings or NFT ownership.
+* [Register](https://github.com/allo-protocol/allo-v2.1/tree/dev/contracts/strategies/extensions/register):
+    Adds recipient registration mechanisms that can be customized according to the specific strategy.
+* [Allocate](https://github.com/allo-protocol/allo-v2.1/tree/dev/contracts/strategies/extensions/allocate):
+    Contains the option to add an allocation time window and manage whitelisted allocators.
+* [Milestones](https://github.com/allo-protocol/allo-v2.1/tree/dev/contracts/strategies/extensions/milestones):
+    Enables milestone-based distribution or allocation, where funds are released upon completion of predefined goals.
+
+## Approach
+
+Extensions are generalized to be inherited by Strategies for implementation.
+There are more complete guides on extension use in the [repository readme](https://github.com/allo-protocol/allo-v2.1/tree/dev/contracts/strategies/extensions#how-to-use-extensions-in-strategies) and [Wonderland Allo v2.1 Explainer](https://mirror.xyz/0xD28D1D7A6FDebEF46330210E65a1EF11bAfea11a/MyqoYrcyOz4qDTbjt5WNCYcQW-MPUEjgEMjy8F-Q7hQ).
+
+## Libraries
+
+To compliment extensions, which are typically *stateful* reusable components,
+[Libraries](https://github.com/allo-protocol/allo-v2.1/tree/dev/contracts/strategies/libraries)
+are also employed to represent reusable helper logic, such as math operations.

pages/strategies/index.md

@@ -16,7 +16,13 @@ There is a wealth of developer-oriented information in the bundled Strategy
 
 ## Strategies
 
-Strategies are responsible for three general concepts:
+While [allocation mechanisms](https://allo.expert/mechanisms) can vary
+significantly, Allo generalizes the pattern to the
+**register-allocate-distribute** flow.
+
+<img src="/Flow of funds-v02.png" alt="The strategy register allocate distribute logic pattern" />
+
+This flow addresses the following:
 
 1. [Recipient Eligibility](/strategies/recipients): Who is eligible to receive
    funding from a pool? How is that eligibility determined?