Add Koala integration (#207)

* Add Koala integration

* restaging integration

* fix naming

* Update Koala manifest

* Add boilerplate for script injection

* Add tracking script

* Add script src

* Add logo

* Update package name

* Add changeset

* Add Koala integration to lock file

* Add assets, update manifest, publish

* Remove unused block

.changeset/three-poems-wave.md

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+---
+'@gitbook/integration-koala': major
+---
+
+Initial publish of the koala integration for GitBook

integrations/koala/.eslintrc.json

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+{
+    "extends": ["@gitbook/eslint-config/integration"]
+}

integrations/koala/gitbook-manifest.yaml

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+name: koala
+title: Koala
+organization: gitbook
+visibility: public
+description: 'Receive GitBook traffic insights directly in your Koala dashboard.'
+icon: ./assets/icon.png
+previewImages:
+    - ./assets/koala-preview.png
+summary: |
+    # Overview
+    This integration allows you to add the Koala tracker on your published GitBook site.
+
+    # How it works
+    The integration injects the Koala Analytics script on your page, using the configured Koala key, \nso that you can get analytics information from your GitBook site.
+
+    # Configure
+    Install the integration on the GitBook space of your choice.
+
+    Locate the Koala key you want to use, which is available in the Koala snippet <pk_xxxxxxxxxxxxxxxxxxx>
+externalLinks:
+    - label: Website
+      url: https://getkoala.com/
+categories:
+    - analytics
+script: src/index.tsx
+scopes:
+    - space:script:inject
+    - site:script:inject
+secrets: {}
+contentSecurityPolicy:
+    script-src: cdn.getkoala.com https://*.getkoala.com;
+configurations:
+    space:
+        properties:
+            koala_key:
+                type: string
+                title: Koala Key
+                description: Available in Koala snippet https://cdn.getkoala.com/v1/<pk_xxxxxxxxxxxxxxxxxxx>/sdk.js
+        required:
+            - koala_key
+    site:
+        properties:
+            koala_key:
+                type: string
+                title: Koala Key
+                description: Available in Koala snippet https://cdn.getkoala.com/v1/<pk_xxxxxxxxxxxxxxxxxxx>/sdk.js
+        required:
+            - koala_key