feat(Makefile): add make help target

[okwn]

Summary

Add a target that extracts all documented Makefile sections and prints them in a human-readable table format.

Changes

• Added GNU bash, version 5.2.21(1)-release (x86_64-pc-linux-gnu)
  These shell commands are defined internally. Type help' to see this list. Type help name' to find out more about the function name'. Use info bash' to find out more about the shell in general.
  Use man -k' or info' to find out more about commands not in this list.

A star (*) next to a name means that the command is disabled.

job_spec [&] history [-c] [-d offset] [n] or hist>
(( expression )) if COMMANDS; then COMMANDS; [ elif C>
. filename [arguments] jobs [-lnprs] [jobspec ...] or jobs >
: kill [-s sigspec | -n signum | -sigs>
[ arg... ] let arg [arg ...]
[[ expression ]] local [option] name[=value] ...
alias [-p] [name[=value] ... ] logout [n]
bg [job_spec ...] mapfile [-d delim] [-n count] [-O or>
bind [-lpsvPSVX] [-m keymap] [-f file> popd [-n] [+N | -N]
break [n] printf [-v var] format [arguments]
builtin [shell-builtin [arg ...]] pushd [-n] [+N | -N | dir]
caller [expr] pwd [-LP]
case WORD in [PATTERN [| PATTERN]...)> read [-ers] [-a array] [-d delim] [->
cd [-L|[-P [-e]] [-@]] [dir] readarray [-d delim] [-n count] [-O >
command [-pVv] command [arg ...] readonly [-aAf] [name[=value] ...] o>
compgen [-abcdefgjksuv] [-o option] [> return [n]
complete [-abcdefgjksuv] [-pr] [-DEI]> select NAME [in WORDS ... ;] do COMM>
compopt [-o|+o option] [-DEI] [name .> set [-abefhkmnptuvxBCEHPT] [-o optio>
continue [n] shift [n]
coproc [NAME] command [redirections] shopt [-pqsu] [-o] [optname ...]
declare [-aAfFgiIlnrtux] [name[=value> source filename [arguments]
dirs [-clpv] [+N] [-N] suspend [-f]
disown [-h] [-ar] [jobspec ... | pid > test [expr]
echo [-neE] [arg ...] time [-p] pipeline
enable [-a] [-dnps] [-f filename] [na> times
eval [arg ...] trap [-lp] [[arg] signal_spec ...]
exec [-cl] [-a name] [command [argume> true
exit [n] type [-afptP] name [name ...]
export [-fn] [name[=value] ...] or ex> typeset [-aAfFgiIlnrtux] name[=value>
false ulimit [-SHabcdefiklmnpqrstuvxPRT] [>
fc [-e ename] [-lnr] [first] [last] o> umask [-p] [-S] [mode]
fg [job_spec] unalias [-a] name [name ...]
for NAME [in WORDS ... ] ; do COMMAND> unset [-f] [-v] [-n] [name ...]
for (( exp1; exp2; exp3 )); do COMMAN> until COMMANDS; do COMMANDS-2; done
function name { COMMANDS ; } or name > variables - Names and meanings of so>
getopts optstring name [arg ...] wait [-fn] [-p var] [id ...]
hash [-lr] [-p pathname] [-dt] [name > while COMMANDS; do COMMANDS-2; done
help [-dms] [pattern ...] { COMMANDS ; } target to using grep-based extraction of comment blocks

• Improves DX for engineers discovering available targets without reading Makefile directly

Testing

• works locally and in CI (no external dependencies)

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/2	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 2 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 2 2 1 if commit is unverified 1 Sum 3