- Test --numa_node 0 case
- Implement histogram stat regions output
- damo show features implementation
  - support target damos filter
  - time based filtering
  - collapse by time
  - collapse by priority value (more histogram control)
  - Implement min/max snapshot format keyword
- damo reclaim: add a command for basic investigation
  - helps ensure DAMON_RECLAIM is working as expected
  - helps reporting issue
- Handle _damon_sysfs file i/o error for unsupported kernel features and
  conflicts with concurrent ones
- Optimize 'replay' performance
  - An approach for 2 MiB-granularity page management didn't show improvement
- Split quota options
  - damos_quota_sz, damos_quota_time, damos_quota_goal,
    dmos_quota_reset_interval
- Move module files to a dedicated directory (src or modules)
- damo record: Let recording without access pattern

- Deprecate old features
  - Deprecate translate_damos (done.)
  - Deprecate single line per-scheme (done.  code moved to _damon_deprecated)
  - Deprecate v1-v3 schemes (done.  necessary code moved to _damon_deprecated)
  - Deprecate python2 support (done.  code moved to _damon_deprecated)
  - Deprecate scheme subcommand
    - Can be replaced by start or tune
  - Deprecate old scheme usages in tests
  - Deprecate DAMON results record binary format (done.  code moved to
    _damon_deprecated)