Update and rename .shfmt to .shfmt.yaml

.github/linters/.shfmt

@@ -1,11 +0,0 @@
-root = true
-
-[*]
-indent_style = space
-indent_size = 2
-end_of_line = lf
-charset = utf-8
-trim_trailing_whitespace = true
-insert_final_newline = true
-[*.md]
-trim_trailing_whitespace = false

.github/linters/.shfmt.yaml

@@ -0,0 +1,35 @@
+# ==================================================================================
+# shfmt Configuration - Shell Script Formatting Standards
+# ==================================================================================
+
+# Indent with 2 spaces
+indent: 2
+
+# Use spaces instead of tabs
+use_tabs: false
+
+# Put binary operators at the beginning of lines
+binary_next_line: true
+
+# Put case statement patterns on the same line as the case
+case_indent: true
+
+# Simplify the code
+simplify: true
+
+# Language variant (bash, posix, mksh)
+language_variant: bash
+
+# Function declaration style
+# func_style: 0  # function name() { ... }
+# func_style: 1  # name() { ... }
+func_style: 1
+
+# Keep column alignment for continuation lines
+keep_column_alignment: true
+
+# Minify scripts by removing comments and extra whitespace
+# minify: false
+
+# Apply formatting recursively to included files
+# find: true