fix(tools/shellfmt): include .eos and .wip board configs in formatting scope

config/boards/ holds five board status extensions per CLAUDE.md
(.conf/.wip/.csc/.tvb/.eos), but the wrapper's find glob only listed
three (.conf/.csc/.tvb), so 32 .eos and 2 .wip board files were never
fed to shfmt. They're shell config files like any other board entry —
no apparent reason for them to be exempt from formatting.

Mirror the same allowlist in scoped-mode's extension regex so the
two modes stay in sync.

Author: iav

lib/tools/shellfmt.sh

@@ -83,7 +83,7 @@ cd "${SRC}"
 
 # Allowed file extensions for both full-tree and scoped modes; keep
 # in sync with the find globs below.
-ALLOWED_EXT_RE='\.(sh|conf|inc|csc|tvb)$'
+ALLOWED_EXT_RE='\.(sh|conf|inc|csc|tvb|eos|wip)$'
 
 declare -a ALL_BASH_FILES=()
 
@@ -109,7 +109,7 @@ if ((${#SCOPED_ARGS[@]} > 0)); then
 	fi
 else
 	# Full-tree mode: aggregate every file the framework cares about.
-	board_config_files=$(find config/boards -type f \( -name "*.conf" -o -name "*.csc" -o -name "*.tvb" \))  # All board config files
+	board_config_files=$(find config/boards -type f \( -name "*.conf" -o -name "*.csc" -o -name "*.tvb" -o -name "*.eos" -o -name "*.wip" \))  # All board config files
 	family_config_files=$(find config/sources -type f \( -name "*.conf" -o -name "*.inc" -o -name "*.sh" \)) # All family config files
 	lib_files=$(find lib -type f -name "*.sh")                                                               # All build framework shell files
 	extensions_files=$(find extensions -type f -name "*.sh")                                                 # All extension shell files