IS-11318 Adjust dev setup script to copy dev loader template to new location + prod loader template improvements

[luisgoncalves]

• After integration the LWA build in the server build (available on the server LWA integration branch), the server now expects the loader template to be views/api-driven-ui/index.vm. ui-kit already has the production template in the correct location, but the script that configures the "development setup" (via Vite dev server et al) was still copying the dev loader to the old location.
• Removal of an unnecessary cache busting query in theme CSS links in the main loader template, because that's already part of the path provided by the server in the Velocity variables.
• Only set CSP img-src if not already set, because it can come from a configured theme variable
• Include details about logo and page symbols in the bootstrap data. Example window.__CONFIG__:

{
  "initialUrl": "/authenticate/username",
  "haapi": {
    "clientId": "urn:se.curity:haapi:type-0",
    "tokenEndpoint": "https://example.com/token"
  },
  "theme": {
    "logo": {
      "path": "/assets/images/curity-logo.svg",
      "isInsideWell": false
    },
    "pageSymbols": {
      "paths": {
        "authenticate_desktop": "/assets/images/login-symbol-computer.svg",
        "authenticate_mobile": "/assets/images/login-symbol-user-computer.svg",
        "authenticate_email": "/assets/images/login-symbol-email.svg",
        "authenticate_card": "/assets/images/login-symbol-card.svg",
        "authenticate_sms": "/assets/images/login-symbol-sms.svg",
        "authenticate_pair_device": "/assets/images/login-symbol-pair-device.svg",
        "authenticate_htmlform": "/assets/images/login-symbol-password.svg",
        "authenticate_totp": "/assets/images/login-symbol-totp.svg",
        "authenticate_bankid": "/assets/images/login-symbol-bankid.svg",
        "authenticate_webauthn": "/assets/images/login-symbol-webauthn.svg",
        "authenticate_opt_in_mfa": "/assets/images/login-symbol-opt-in-mfa.svg",
        "authenticate_passkeys": "/assets/images/login-symbol-passkeys.svg",
        "authenticate_openid_wallet": "/assets/images/login-symbol-openid-wallet.svg",
        "error_generic": "/assets/images/login-symbol-exclamation.svg"
      },
      "basePath": "/assets/images/"
    }
  }
}