feat: flip swap mechanism on circinus — MD as primary, RST as override

Mirror of #1899 for circinus. Same logic, same scripts, per-branch file set.

Changes:
- Rename docs/**/md-<stem>.md to docs/**/<stem>.md (drop md- prefix) for
  all 253 stems previously listed in docs/_swap.txt
- Rename docs/**/<stem>.rst to docs/**/rst-<stem>.rst (add rst- prefix)
  for the same 253 stems
- Repurpose docs/_swap.txt as docs/_rst_overrides.txt; initially empty
- conf.py exclude_patterns flipped: rst-*.rst excluded by default
- conf.py runtime-artifact references updated to _rst_override_state.json
  and _md_exclude.txt
- scripts/swap_sources.py rewritten with inverted rename direction
  (rst-<stem>.rst → <stem>.rst when applying overrides; <stem>.md
  excluded via _md_exclude.txt)
- scripts/import_myst.py and tests/test_import_myst.py deleted (obsolete)
- tests/test_swap_sources.py rewritten for new semantics

Identical change set to #1899 (current). Per-branch differences:
- circinus has 253 stems vs current's 254 (suricata is current-only)
- otherwise the script/conf.py/test changes are byte-identical with current

Generated by robots https://vyos.io

0 files changed, 0 insertions, 0 deletions