feat: enhance key generation and update dependencies

- Added new fields (caCert, caKey, clientCert, clientKey) to the Keygen model for improved certificate management.
- Implemented key generation logic in the seed process to create and update keygen configurations.
- Updated AxiosService to utilize HTTPS agent for secure requests with client certificates.
- Introduced new utility functions for certificate handling and updated related imports.
- Bumped versions of @peculiar/webcrypto, @peculiar/x509, and node-forge in package.json and package-lock.json for enhanced security and functionality.

Author: kastov

package-lock.json

@@ -65,6 +65,8 @@
     "@nestjs/schedule": "5.0.1",
     "@nestjs/serve-static": "5.0.3",
     "@nestjs/swagger": "11.1.0",
+    "@peculiar/webcrypto": "^1.5.0",
+    "@peculiar/x509": "^1.12.3",
     "@prisma/client": "6.5.0",
     "@remnawave/node-contract": "0.4.1",
     "@remnawave/xtls-sdk": "^0.2.0",
@@ -89,6 +91,7 @@
     "nest-winston": "^1.10.2",
     "nestjs-cls": "^5.4.1",
     "nestjs-zod": "4.3.1",
+    "node-forge": "^1.3.1",
     "p-map": "^7.0.3",
     "passport": "0.7.0",
     "passport-http": "^0.3.0",
@@ -119,6 +122,7 @@
     "@types/lodash": "^4.17.16",
     "@types/morgan": "^1.9.9",
     "@types/node": "^22.13.13",
+    "@types/node-forge": "^1.3.11",
     "@types/passport-http": "^0.3.11",
     "@types/passport-jwt": "^4.0.1",
     "@types/semver": "^7.5.8",
@@ -138,4 +142,4 @@
     "typescript": "~5.8.2",
     "typescript-eslint": "^8.28.0"
   }
-}
+}