[Feature] Using the compile command provided in README.txt

[MarkChenYutian]

Is your feature request related to a problem? Please describe.

Though mentioned in the tutorial page, students tend to be confused by the concept that order of editor tabs is the order of file names send to compiler.

In 15-122 course project / homework, the codebase mostly comes with a README.txt file which includes some command lines showing how to compile the project. Usually in form of

    % cc0 a.c0 b.c0 -W -d

If the visualizer can detect this file sequence and apply the recommended compile order automatically, it will be easier to use and we won't need to rearrange the tabs manually in a large project.

Describe the solution you'd like

Add an editor tab that shows the README.txt file. If a line is a valid cc0 compiler command in form mentioned above, record the file sequence and apply the sequence when possible.

If the provided command is not possible (e.g. missing files in C0VM.ts), or no such command is found, then fallback to use the editor tab order.

Additional context
Requested by prof. Iliano

[MarkChenYutian]

This problem will be resolved on PR #44

A 15-122 project import guider is constructed to guide students to import their code into the visualizer.