feat(cmdatom)!: eliminate the need for vim-repeat #41414

Problem:
- `lhs` is not fully realized. E.g. for a "payload" mapping
  `lhs` omits the `getchar()` payload during a mapping (vim-surround
  `ds'` reports `lhs="ds"`). This means plugins like vim-repeat are
  still needed...
- The "delta" fields of a CmdAtom are calculated too late.
  - `<abuf>` and `changed` check whatever (wrong) buffer a command
    (":bnext") might land in.
  - CTRL-W_w between two windows on the same buffer reports type="motion".

Solution:
- `CmdOrigin` samples (buf/win/cursor/changedtick) at each "scope" entry
  (CmdFrame, composite, Visual session, insert session).
- `dd<C-w>l` reports `changed=true` for the buffer it edited, regardless
  of where the cursor ends up.
- New fields:
  - `pos`: cursor position at command start.
  - `moved`: indicates whether the cursor moved (in same buffer).
  - `undoseq`: undo state at settlement.
- lhs now includes the payload: "ds)" reports lhs="ds)" instead of "ds".
  - Easy for users to "replay" any atom.
- Rename: type "command" => "normal", "ex" => "excmd"; `arg` => `cmdarg`
- Drop `cascade` field (no reason to expose it)

0 files changed, 0 insertions, 0 deletions