feat: add scx-scheds

[castrojo]

This adds support for scx-scheds, same package in bazzite. This will only work on fsync kernels like the one in :latest.

Running the tools on stock kernels is a noop so :stable and :gts are safe:

❯ sudo scx_bpfland 
[sudo] password for jorge: 
23:30:09 [INFO] scx_bpfland 1.0.4 x86_64-unknown-linux-gnu SMT on
Error: sched_ext_ops.dump() missing, kernel too old?

[castrojo]

And here it is on :latest with an fsync kernel:

❯ sudo scx_bpfland
[sudo] password for jorge: 
23:38:58 [INFO] scx_bpfland 1.0.4 x86_64-unknown-linux-gnu SMT on
23:38:58 [INFO] preferred CPU domain = 0xfff
23:38:58 [INFO] primary CPU domain = 0xfff
23:38:58 [INFO] cpufreq performance level: auto
23:38:58 [INFO] L2 cache ID 0: sibling CPUs: [0, 6]
23:38:58 [INFO] L2 cache ID 1: sibling CPUs: [1, 7]
23:38:58 [INFO] L2 cache ID 3: sibling CPUs: [3, 9]
23:38:58 [INFO] L2 cache ID 2: sibling CPUs: [2, 8]
23:38:58 [INFO] L2 cache ID 4: sibling CPUs: [4, 10]
23:38:58 [INFO] L2 cache ID 5: sibling CPUs: [5, 11]
23:38:58 [INFO] L3 cache ID 0: sibling CPUs: [0, 6, 1, 7, 2, 8, 3, 9, 4, 10, 5, 11]