🤖 ci: reduce make fmt verbosity when no changes (#585)

Formatter tools were outputting file-by-file status even when nothing
changed, producing 100+ lines of noise. Now they only show section
headers and a final success message (~6 lines).

**Changes:**
- prettier: Use `--log-level error` for write, `--log-level warn` for
check
- ruff: Add `--quiet` flag to suppress detailed output
- shfmt: Redirect stdout to `/dev/null` during formatting

Output still shows warnings when files need formatting and maintains
proper exit codes.

_Generated with `mux`_

Author: ammar-agent

fmt.mk

@@ -26,19 +26,19 @@ fmt-check: fmt-prettier-check fmt-shell-check fmt-python-check fmt-nix-check
 
 fmt-prettier:
 	@echo "Formatting TypeScript/JSON/Markdown files..."
-	@$(PRETTIER) --write $(PRETTIER_PATTERNS)
+	@$(PRETTIER) --log-level error --write $(PRETTIER_PATTERNS)
 
 fmt-prettier-check:
 	@echo "Checking TypeScript/JSON/Markdown formatting..."
-	@$(PRETTIER) --check $(PRETTIER_PATTERNS)
+	@$(PRETTIER) --log-level log --check $(PRETTIER_PATTERNS)
 
 fmt-shell:
 ifeq ($(SHFMT),)
 	@echo "Error: shfmt not found. Install with: brew install shfmt"
 	@exit 1
 else
 	@echo "Formatting shell scripts..."
-	@shfmt -i 2 -ci -bn -w $(SHELL_SCRIPTS)
+	@shfmt -i 2 -ci -bn -w $(SHELL_SCRIPTS) >/dev/null
 endif
 
 fmt-shell-check:
@@ -59,11 +59,11 @@ endif
 
 fmt-python: .check-uvx
 	@echo "Formatting Python files..."
-	@$(UVX) ruff format $(PYTHON_DIRS)
+	@$(UVX) ruff format --quiet $(PYTHON_DIRS)
 
 fmt-python-check: .check-uvx
 	@echo "Checking Python formatting..."
-	@$(UVX) ruff format --check $(PYTHON_DIRS)
+	@$(UVX) ruff format --quiet --check $(PYTHON_DIRS)
 
 fmt-nix:
 ifeq ($(NIX),)