Merge pull request #171 from douglasmun/release/v3.0

release: cut v3.0 — version bump + demo ISO refresh

Merge pull request #157 from douglasmun/release/v2.9

release: v2.9

Merge pull request #141 from douglasmun/fuzz/input-surfaces

Fuzz every input surface: 35 defects fixed (v2.8)

Merge pull request #109 from douglasmun/release/v2.7

release: v2.7 — version bump + refresh the demo ISO (103 commits stale)

Merge pull request #69 from douglasmun/fix/chmod-ownership-check

ramfs: enforce ownership in ramfs_chmod

Merge pull request #68 from douglasmun/web/refresh-iso-v2.5

web: refresh the demo ISO to v2.5 (main @ 209729b)

Merge pull request #57 from douglasmun/web/refresh-iso-ring3-shell

web: refresh the demo ISO to current main (ring-3 shell is now the default)

Merge pull request #33 from douglasmun/feat/pipes

feat: shell pipelines (`cmd | cmd`)

Merge pull request #26 from douglasmun/feat/fbcon-libc-blocking

Framebuffer console, tiny libc + FAT32 exec, blocking syscalls

Merge pull request #20 from douglasmun/web/refresh-iso-wxaudit-cap

web: refresh demo ISO with wxaudit console-flood cap