Add compatibility test scripts

[alchem0x2A]

Add more scripts for compatibility tests on laikapack / nersc systems. Thanks inputs from Zhengji, now all VASP on NERSC are at least with minimal support in VaspInteractive.

Contents added:

1. [x] Test slurm scripts in examples/command-test-examples
2. [x] Fix some bugs in ex00
3. [x] Use gist to store test results from nersc scripts (https://gist.github.com/alchem0x2A/afede700c2b7703c77e10e51333bfa75)
4. [x] Add a workflow to automatically label tests results using shield.io badge
5. [x] Create a one-click action to send test to target machines
6. [x] Time stamping on the gist entries

[alchem0x2A]

An example of CI workflow testing the binary compatibilities can be seem in https://github.com/ulissigroup/vasp-interactive/actions/runs/3294628109:

• For Cori / Perlmutter tests, action runner sends the slurm script to nersc and start an interactive job (for real-time pipeline).

• To test the docker images, the test script is simply send to Perlmutter login node and tested in shifter, since it's relatively light job.

• After each job finishes, the test results are send to gist https://gist.github.com/alchem0x2A/afede700c2b7703c77e10e51333bfa75. The final step in the action uses examples/command-test-examples/gist_to_table.py to render the readme section and make a commit if the content changes. Example readme output looks like:

	Docker images (**)	Cori Haswell (†)	Cori KNL (†)	Perlmutter CPU (†)	Perlmutter GPU (†)
VASP 5.4.x
VASP 5.4.x - TPC (*)
VASP 6.1.x
VASP 6.2.x
VASP 6.2.x - TPC (*)
VASP 6.3.x
VASP 6.3.x - TPC (*)

The workflow is dispatch-only to limit misusage on nersc quota. Things to think about for future maintance:

• [ ] Update nersc ssh key in repo setting (infrequent)
• [ ] Create base conda env on nersc (infrequent, can refer to readme)
• [ ] Manual test with newer VASP versions / rebuilding docker image