Add TC hook functionality

- [ ] BPF_PROG_TYPE_SCHED_CLS
- [ ] BPF_PROG_TYPE_SCHED_ACT

For some documentation, see:
- https://blogs.oracle.com/linux/post/bpf-a-tour-of-program-types section 2
- https://www.man7.org/linux/man-pages/man8/tc-bpf.8.html

Start with the BPF_PROG_TYPE_SCHED_CLS and BPF_PROG_TYPE_SCHED_ACT checklist items, then read the linked Oracle overview and tc-bpf(8) documentation. Done means implementing and validating TC hook functionality for both listed program types; the issue does not name source files or tests to run.

Written by the indexing model from the issue text.