Add installation docs

Author: jonnydgreen

docs/latest/getting-started/create-action-node.md

@@ -14,7 +14,7 @@ folder.
 
 - Ensure you have familiarised yourself with the
   [Action Node](../nodes/action-node.md) docs.
-- Parley is installed and running in your Godot Editor.
+- Parley is [installed](./installation.md) and running in your Godot Editor.
 - You have followed the [instructions](./register-action.md) to add the relevant
   actions to the system.
 - You have created a basic Dialogue Sequence before. Consult the

docs/latest/getting-started/create-condition-node.md

@@ -17,7 +17,7 @@ folder.
 
 - Ensure you have familiarised yourself with the
   [Condition Node](../nodes/condition-node.md) docs.
-- Parley is installed and running in your Godot Editor.
+- Parley is [installed](./installation.md) and running in your Godot Editor.
 - You have followed the [instructions](./register-fact.md) to add the relevant
   facts to the system.
 - You have created a basic Dialogue Sequence before. Consult the

docs/latest/getting-started/create-dialogue-node.md

@@ -13,7 +13,7 @@ folder.
 ## Pre-requisites
 
 - Familiarise yourself with the [Dialogue Node](../nodes/dialogue-node.md) docs.
-- Parley is installed and running in your Godot Editor.
+- Parley is [installed](./installation.md) and running in your Godot Editor.
 - You have followed the [instructions](./register-character.md) to add the
   relevant characters to the system.
 - You have created a basic Dialogue Sequence before. Consult the

docs/latest/getting-started/create-dialogue-option-node.md

@@ -13,7 +13,7 @@ folder.
 
 - Familiarise yourself with the
   [Dialogue Option Node](../nodes/dialogue-option-node.md) docs.
-- Parley is installed and running in your Godot Editor.
+- Parley is [installed](./installation.md) and running in your Godot Editor.
 - You have followed the [instructions](./register-character.md) to add the
   relevant characters to the system.
 - You have created a basic Dialogue Sequence before. Consult the

docs/latest/getting-started/create-end-node.md

@@ -17,7 +17,7 @@ folder.
 
 - Ensure you have familiarised yourself with the
   [End Node](../nodes/end-node.md) docs.
-- Parley is installed and running in your Godot Editor.
+- Parley is [installed](./installation.md) and running in your Godot Editor.
 - You have created a basic Dialogue Sequence before. Consult the
   [getting started guide](./create-dialogue-sequence.md) for more info.
 

docs/latest/getting-started/create-match-node.md

@@ -15,7 +15,7 @@ folder.
 
 - Ensure you have familiarised yourself with the
   [Match Node](../nodes/match-node.md) docs.
-- Parley is installed and running in your Godot Editor.
+- Parley is [installed](./installation.md) and running in your Godot Editor.
 - You have followed the [instructions](./register-fact.md) to add the relevant
   facts to the system. Make sure you create a fact with well-known values.
 - You have created a basic Dialogue Sequence before. Consult the

docs/latest/getting-started/create-start-node.md

@@ -12,7 +12,7 @@ folder.
 ## Pre-requisites
 
 - Familiarise yourself with the [Start Node](../nodes/start-node.md) docs.
-- Parley is installed and running in your Godot Editor.
+- Parley is [installed](./installation.md) and running in your Godot Editor.
 - You have created a basic Dialogue Sequence before. Consult the
   [getting started guide](./create-dialogue-sequence.md) for more info.