docs: flatten structure and rename tutorials and concepts (#68)

Author: EscapedGibbon

.frontmatter/database/pinnedItemsDb.json

@@ -14,6 +14,9 @@
 .env.development.local
 .env.test.local
 .env.production.local
+.frontmatter
+.vscode
+frontmatter.json
 
 npm-debug.log*
 yarn-debug.log*

.frontmatter/database/taxonomyDb.json

@@ -35,7 +35,7 @@ $$New Intensity = Max Intensity - Original Intensity$$
 Where $$Max Intensity$$ is the maximum possible intensity value for the color channel.
 
 :::warning
-ImageJS uses components to calculate each pixel value and leaves alpha channel unchanged. For more information about channels and components visit [this link](../../Tutorials%20and%20concepts/Concepts/Channel%20vs%20component.md).
+ImageJS uses components to calculate each pixel value and leaves alpha channel unchanged. For more information about channels and components visit [this link](../../Useful%20tips/Channel%20vs%20component.md).
 :::
 
 </details>

.gitignore

@@ -1,5 +1,5 @@
 ---
-sidebar_position: 40
+sidebar_position: 100
 ---
 
 ### Alpha channel

.vscode/settings.json

@@ -0,0 +1,3 @@
+{
+  "position": 30
+}