- Added a new function `GetApiFile` to generate the TypeScript API file dynamically based on environment variables.
- Updated `TSEndpoint` struct to include an `Imports` map for tracking TypeScript imports.
- Enhanced `VerifyTypes` method to manage request and response types more effectively, including nullable types.
- Modified `ToTs` method to generate TypeScript code with improved type handling.
- Introduced `TSFiles` struct for managing generated TypeScript files and saving them to the filesystem.
- Implemented formatting of generated TypeScript code using Prettier.
- Added new TypeScript files for various endpoints, including user management and system utilities.
- Updated existing TypeScript files to reflect changes in API structure and response types.
- Created a new HTML file for the signup page at `backend/spa/signup/index.html`.
- Added HTML and plain text templates for password reset emails at `backend/templates/mailTemplates/password_reset.html.tmpl` and `backend/templates/mailTemplates/password_reset.txt.tmpl`.
- Added HTML and plain text templates for registration confirmation emails at `backend/templates/mailTemplates/registration.html.tmpl` and `backend/templates/mailTemplates/registration.txt.tmpl`.