move demo/ to docs/tutorial/, commit assets, consolidate TUI docs

- demo/ renamed to docs/tutorial/ (tapes, scripts, TUTORIAL.md)
- docs/tutorial/assets/ added to git (51 MB of GIFs + PNGs); removed
  /demo/assets/ from .gitignore so images render on Codeberg
- docs/tui-reference.md removed; its hotkey tables merged into a new
  "Hotkey Quick Reference" section at the end of TUTORIAL.md
- TUTORIAL.md: updated install section (mage buildDocker, no
  GOTOOLCHAIN=auto), fixed README relative path (../../README.md),
  updated internal tapes/scripts/assets path prose
- README.md: updated all demo/ image paths and links to docs/tutorial/;
  TUI and recording-modes links now point to TUTORIAL.md anchors
- AGENTS.md: updated demo/ references to docs/tutorial/
- Magefile.go: updated demoDir/demoTapesDir/demoScriptsDir/demoRunTape/
  demoSudoKeepers constants to docs/tutorial/ paths

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 22 insertions, 0 deletions

diff --git a/docs/tutorial/tapes/13-tui-flamegraph.tape b/docs/tutorial/tapes/13-tui-flamegraph.tape
new file mode 100644
index 0000000..7572159
--- /dev/null
+++ b/docs/tutorial/tapes/13-tui-flamegraph.tape
@@ -0,0 +1,22 @@
+# 13-tui-flamegraph: in-TUI flamegraph view. The default landing tab (key `1`) is the
+# live flamegraph. Workload running in the background drives real frame data.
+# `-fields` and `-count` let you reshape stack ordering and the size metric.
+Output demo/assets/13-tui-flamegraph.gif
+Set Shell "bash"
+Set Padding 20
+
+Hide
+Type "cd $(mktemp -d -t ior-demo-XXXX) && clear"
+Enter
+Sleep 300ms
+Show
+
+Type "sudo -n /home/paul/git/ior/ior -fields comm,path,tracepoint -count count"
+Enter
+Sleep 5s
+Enter
+Sleep 8s
+Screenshot demo/assets/screenshot-flamegraph.png
+Sleep 2s
+Type "q"
+Sleep 1s