feat(ultraplan-local): tally CLI baseline fixture for examples/02-real-cli (Spor B B2) [skip-docs]

Adds the runnable counterpart to examples/01-add-verbose-flag (which is
artifacts-only). The fixture is the measurement target for Spor B's
end-to-end pipeline run (B3) and Spor C's cache-prefix experiment.

Baseline:
- tally.mjs (80 lines, hand-rolled argv parser, zero deps)
- 3 flags: --json, -i/--ignore-case, --lines + --help
- Exit codes: 0 success, 1 file error, 2 invalid argv
- 10 node:test cases, all green (~2.2s wall-clock)
- Deterministic fixtures: sample.txt (foo×7, Foo×1, regex fo+×9) +
  poem.txt (--lines vs total distinction)
- REGENERATED.md skeleton (B3 fills the pipeline walk-through)

Brief preconditions verified:
- grep -c 'foo' sample.txt = 4 (>= 1)
- regex /fo+/g count = 9 (> grep count)
- Brief assumptions for B3 SC #1, #3 hold

This is the first runnable example in plugins/ultraplan-local/examples/.
Next: B3 runs /ultraresearch-local + /ultraplan-local + /ultraexecute-local
against the brief to add --regex/-r, then verifies all 10 Success Criteria.

plugins/ultraplan-local/examples/02-real-cli/fixtures/poem.txt

@@ -0,0 +1,5 @@
+foo on this line
+nothing here
+foo and foo here
+silence
+foo

plugins/ultraplan-local/examples/02-real-cli/fixtures/sample.txt

@@ -0,0 +1,9 @@
+Foo bar baz
+The quick brown fox jumps over the foo
+foo foo bar foo
+food for thought.
+fooo, fooooo, very loud
+This line has no match here.
+A line without the magic word
+And another one without it
+The end. Final period.