Add root command to open depository with $EDITOR

- Implement openDepository function in cmd/root.go to open the depository directory in $EDITOR
- Falls back to vi if $EDITOR is not set
- Update README.md with new usage section documenting bare 'jade' command
- Include config.go changes that move config location to depository/.jade/

jade-depo/README.md

@@ -19,6 +19,16 @@ go build -o jade
 
 ## Usage
 
+### Open Depository
+
+```bash
+# Open the depository directory in your $EDITOR
+jade
+
+# This opens ~/jade-depository (or your configured path) in your editor
+# Works great with neovim, vim, or any editor that supports directory opening
+```
+
 ### Initialize and List Notes
 
 ```bash
@@ -77,24 +87,24 @@ jade tags
 
 ## Configuration
 
-Configuration is stored in `~/.config/jade/config.yml` (by default).
+Configuration is stored in `<depo_path>/.jade/config.yml` and is created automatically when you first run jade.
 
 Example config:
 ```yaml
 depo_path: /home/user/jade-depository
-config_path: /home/user/.config/jade
 tag_prefix: "+"
 ```
 
 You can override these with flags:
 - `--depo`: Depository path
-- `--config`: Config directory path
+- `--config`: Config file path (if you need to override the default location)
 
 ## Depository Structure
 
 ```
 jade-depository/
 ├── .jade/
+│   ├── config.yml      # Configuration file
 │   └── trash/          # Deleted notes go here
 ├── note-1.md
 ├── note-2.md
@@ -102,7 +112,7 @@ jade-depository/
     └── note-3.md
 ```
 
-The `.jade/` directory is automatically created and should be added to `.gitignore`.
+The `.jade/` directory is automatically created and contains configuration and metadata. You can optionally add it to `.gitignore` if you don't want to track it in version control.
 
 ## Note Format