Add minio-upload skill and update README.md to match actual project structure

skills/minio-upload/scripts/upload_to_obsidian.sh

@@ -0,0 +1,44 @@
+#!/bin/bash
+#
+# Upload files to MinIO obsidian bucket
+# Usage: upload_to_obsidian.sh <file_path> [subpath]
+#
+# Arguments:
+#   file_path - Path to the file to upload
+#   subpath   - Optional subpath within obsidian bucket (default: main)
+#
+# Examples:
+#   upload_to_obsidian.sh temp/file.md
+#   upload_to_obsidian.sh temp/file.md notes/2024
+#   upload_to_obsidian.sh temp/file.md "archive/old projects"
+
+set -e
+
+# Check arguments
+if [ $# -lt 1 ]; then
+    echo "Usage: $0 <file_path> [subpath]" >&2
+    exit 1
+fi
+
+FILE_PATH="$1"
+SUBPATH="${2:-main}"  # Default to 'main' if not specified
+
+# Validate file exists
+if [ ! -f "$FILE_PATH" ]; then
+    echo "Error: File '$FILE_PATH' does not exist" >&2
+    exit 1
+fi
+
+# Get filename
+FILENAME=$(basename "$FILE_PATH")
+
+# Construct target path
+TARGET_PATH="minio/obsidian/${SUBPATH}/${FILENAME}"
+
+# Ensure subpath ends without trailing slash for mc
+TARGET_PATH=$(echo "$TARGET_PATH" | sed 's://*:/:g')
+
+# Upload file
+mc cp "$FILE_PATH" "$TARGET_PATH"
+
+echo "✅ Uploaded: $FILE_PATH -> $TARGET_PATH"