Implement project picker keyboard shortcut and enhance feature management

- Added a new keyboard shortcut 'P' to open the project picker dropdown.
- Implemented functionality to select projects using number keys, allowing users to quickly switch between projects.
- Updated the feature list to include a new feature for project selection via keyboard shortcuts.
- Removed obsolete coding_prompt.md and added initializer_prompt.md for better session management.
- Introduced context management for features, enabling reading, writing, and deleting context files.
- Updated package dependencies to include @radix-ui/react-checkbox for enhanced UI components.

This commit enhances user experience by streamlining project selection and improves the overall feature management process.

🤖 Generated with Claude Code

app/src/components/views/spec-view.tsx

@@ -97,16 +97,6 @@ export function SpecView() {
           </div>
         </div>
         <div className="flex gap-2">
-          <Button
-            variant="outline"
-            size="sm"
-            onClick={loadSpec}
-            disabled={isLoading}
-            data-testid="reload-spec"
-          >
-            <RefreshCw className="w-4 h-4 mr-2" />
-            Reload
-          </Button>
           <Button
             size="sm"
             onClick={saveSpec}