Add spell-check to CI

.github/.cspell/organization-dictionary.txt

@@ -0,0 +1,109 @@
+// This is a dictionary shared by projects under https://github.com/taiki-e.
+// It is not intended for manual editing.
+
+endo
+taiki
+
+// tool name and its configs or options
+asan
+cflags
+clippy
+codegen
+cxxflags
+exitcode
+miri
+miriflags
+msan
+retag
+rustc
+rustdoc
+rustdocflags
+rustflags
+rustfmt
+rustsec
+rustup
+valgrind
+xcompile
+Zdoctest
+Zmiri
+
+// Rust target triple
+aarch
+androideabi
+armeb
+armebv
+armv
+asmjs
+atmega
+bpfeb
+bpfel
+cuda
+eabi
+eabihf
+emscripten
+espidf
+fortanix
+gnuabi
+gnueabi
+gnueabihf
+gnullvm
+gnuspe
+gnux
+illumos
+imac
+macabi
+mipsel
+mipsisa
+msvc
+muslabi
+musleabi
+musleabihf
+nvptx
+openwrt
+riscv
+softfloat
+sparcv
+thumbeb
+thumbebv
+thumbv
+tvos
+uclibc
+uclibceabi
+uclibceabihf
+uefi
+vxworks
+wasi
+watchos
+xous
+
+// Rust other
+alloc
+canonicalize
+consts
+deque
+doctest
+hasher
+inlateout
+intrinsics
+lateout
+msrv
+peekable
+punct
+repr
+rfind
+rfold
+splitn
+uninit
+
+// Other
+connrefused
+cygwin
+euxo
+msys
+noninteractive
+noprofile
+norc
+pipefail
+powerset
+proto
+tlsv

.github/.cspell/project-dictionary.txt

@@ -0,0 +1,19 @@
+binstall
+bytecodealliance
+jfrimmel
+koalaman
+libc
+linkcheck
+mdbook
+mvdan
+nextest
+protobuf
+protoc
+protocolbuffers
+quickinstall
+rustwasm
+shellcheck
+shfmt
+toolchains
+udeps
+wasmtime