Embedded IDE v3.8.8

[v3.8.8] revision (patch for v3.8.4)

New:

• Add Exclude/Include Child Sources context menu for source folder
• Brand new documentation, product landing page, here: https://em-ide.com

Change:

• Adjust eide.json structure
• Generate a .eide.usr.ctx.json file to save user context data (can be ignored in .gitignore)

Optimize:

• Format project name when import project from other IDE
• Optimize source code structure