Use Jsdos as primary emulator

Use Jsdos as primary emulator

• MS-DOS support has been removed. If you still need to use MS-DOS, you can revert to version 1.x. The Worker mode of JSDOS should meet the requirements of most current usage scenarios.
• Removed the bundled DOSBox binary and removed the dependency on the vscode-dosbox extension for easier maintenance.
• Refactored the ASM-related code modules, as the original code was difficult to debug and read.
• Merged PR #60, thanks to Gerrnperl for contribution.
• 2.0.2 add the support of jsdosX