refactor: bootstrap/infra/ci separation (#27)

- Create bootstrap/ dir: cert-manager, traefik-routes, argo-rollouts,
  kargo, kargo-*-pipeline (not managed by Kargo promotion)
- infra/ now only: gitea, gitea-custom (promoted by Kargo)
- ci/ unchanged: gitea-runner (promoted by Kargo)
- Split kargo/credentials/ into dev/ and prod/ with separate ksops generators
- Remove kargo-credentials from AppSet (managed by Pulumi Go code)
- Update infra Warehouse: only gitea (was also argo-rollouts, cert-manager)
- Update infra Stage dev: only yaml-update for gitea version
- Fix test-env warehouse: valid subscription instead of empty array
- Update step numbers: bootstrap 1-5, infra 1-2

bootstrap/kargo/values/secret-values.dev.enc.yaml

@@ -0,0 +1,27 @@
+# Kargo secrets for dev/test cluster
+passwordHash: ENC[AES256_GCM,data:qmQr8l5EK92BZyadoAU0+hrOS2N8evnmxroL13GhQbD9idHKhHwkSt6fn1OgYyu+CtnJ6BxeyDyJCNbN,iv:4tnO8HczTo4GO+NFFQK6JRsOYXkS3wFiJfwYrCmot0M=,tag:LTeO8xl31f4+oLy/FDEyIQ==,type:str]
+tokenSigningKey: ENC[AES256_GCM,data:Plf3vK+DJYmFsvS1cHTKtPvsvCC17i2/0lAEnG65CZVcrtux3+BiMY7rukLfW7uw/hQ+6JLB1PS4EWIGMNx/xw==,iv:54mdXGpgJ3f1dkeTyfZbfSoufJE89MUYIQpEz6jUt0E=,tag:KqK4shNvrQ7Dbu0+uYqjPw==,type:str]
+sops:
+    age:
+        - recipient: age1xmnaqlrjzpk5hl7uhel9sehqh7zdz8p59qte2myt97aqd7lyeuxszuess7
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSAwVHNjbmJ2K3ljSHNmdEpE
+            RzdrL1o5ZXhxQXl0N0ptWk5JWjlCYnVtTXdZCkRWUDl5RkkzYXFBbjRpMmdnY254
+            YWhPeEw0MzF6K2VoTEI1R09PV0szQlkKLS0tIG42S0h4VUtsaWN0WTI0V1piYTU5
+            MUYvbzVyWUVRZHRYd21MY2dWMzVBTE0KJ0cSonX/lD3PBjz3BFFPkea+XDDPqGAF
+            gd20j8xOjyV1nu6Dg1qq80ZN3E0rotXnTK5zu/AyW4wcByUTG465Hw==
+            -----END AGE ENCRYPTED FILE-----
+        - recipient: age1ame2tp44sq9rmkqzqvxy77eu7qd2035kmlgcsfjfxj2jughv3clqlku03g
+          enc: |
+            -----BEGIN AGE ENCRYPTED FILE-----
+            YWdlLWVuY3J5cHRpb24ub3JnL3YxCi0+IFgyNTUxOSBBUmlEM1Z4NDRZaU9LSFF3
+            SjZnM0R6U0NlYWtkbGFMdGRXbW9YRjBIeVVjCk9nV05aZk04L0xvUnk4c3hRczZV
+            ZEY4dmI0NndjWHEvSDJ6OTUrS3owM3cKLS0tIFFhWUk5Qy9GMGNrWGM2WnY4SWNm
+            UVVUcktPakNYeWVxakp2RjQweG41MVEKoHKCkhsn29s4JuRCfBqoF78/UcShnCAx
+            sGnz9zTnE+LSVMbknG1+Y3kFdRNXesLFZfyyk3W2atjp7Tw9rGYWTw==
+            -----END AGE ENCRYPTED FILE-----
+    lastmodified: "2026-03-11T06:57:04Z"
+    mac: ENC[AES256_GCM,data:E4jKWJsO9bEMzEjmp+XhBx45heXB7W5op11YyC2TV2KA0PNfAa7eZXIAZ7PVjVIfhbmODv3pd3KG4mY7lJ9I1ly6VfFGl4wMtXZkQlVt5+2DF6GyLGGfjKftRcGni4xP2J4wfzZGiIiQ2G8IUfmGy8Wpegw9lo6/UvES1w1kies=,iv:6fwg2NNoZnKq9jiFHLRQ6FZXrx9OzFEnxWU1VwEVoj0=,tag:CiJAekk+4dp/pyWkqXJKVw==,type:str]
+    encrypted_regex: ^(password|token|secret|key|privateKey|admin-password|db-password|passwordHash|tokenSigningKey)$
+    version: 3.12.1