✨ Add Code Scanning Tools Integration Page

Documents how to integrate Pixeebot with Sonar. It doesn't feel right to
only have one tool on this page, so I mentioned that CodeQL is "coming
soon". Practically, we have CodeQL integration by ways of GitHub
Advanced Security right now, and documenting this is the subject of
another task we will get to next week.

docs/code-scanning-tool-fixes.md

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+# Code Scanning Tool Fixes
+
+Pixeebot automatically fixes issues detected by code scanning tools when synced with the results of those scans. This page explains how to integrate code scanning tools with Pixeebot, so that Pixeebot may fix the issues those tools find.
+
+## Sonar
+
+Pixeebot fixes issues detected by Sonar when repositories have both the Pixeebot and Sonar GitHub Apps installed.
+
+For public repositories using SonarCloud, Pixeebot retrieves results from sonarcloud.io automatically with no further configuration required from the user.
+
+For private repositories using SonarCloud, use the [pixee/upload-tool-results-action](https://github.com/pixee/upload-tool-results-action) GitHub Action to synchronize SonarCloud findings with Pixeebot.
+
+## CodeQL
+
+Coming soon!

docs/codemods/overview.md

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 # Core Codemods

docs/faqs.md

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 # FAQs

docs/using-pixeebot.md

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 # User guide