A few renames; oscore -> tier-1

Prep for multiple tiers.

README.md

@@ -19,7 +19,7 @@ via `rpm-ostree compose image`.
 
 ## What's in them?
 
-The [current manifest definitions](oscore/) were forked from Fedora CoreOS, but significantly
+The [current manifest definitions](tier-1/) were forked from Fedora CoreOS, but significantly
 cut down.
 
 The existing content set is obviously subject to change and debate.

c9s-base.yaml

@@ -5,9 +5,9 @@ repos:
   - appstream
 
 metadata:
-  name: c9s-oscore
-  summary: CentOS 9 OSCore
+  name: c9s-boot-tier1
+  summary: CentOS 9 Bootable Tier 1
 
 include:
-  - oscore/manifest.yaml
+  - tier-1/manifest.yaml
 

c9s-rt.yaml

@@ -1,3 +1,3 @@
 include:
   - c9s-base.yaml
-  - oscore/kernel-rt.yaml
+  - tier-1/kernel-rt.yaml

c9s.yaml

@@ -1,4 +1,4 @@
 include:
   - c9s-base.yaml
-  - oscore/kernel.yaml
+  - tier-1/kernel.yaml
 

fedora.yaml

@@ -5,12 +5,12 @@ repos:
   - fedora-updates
 
 metadata:
-  name: fedora-oscore
-  summary: Fedora OSCore
+  name: fedora-boot-tier1
+  summary: Fedora Bootable Tier 1
 
 include:
-  - oscore/manifest.yaml
-  - oscore/kernel.yaml
+  - tier-1/manifest.yaml
+  - tier-1/kernel.yaml
 
 packages:
   # Storage; it's used in Fedora workstation for example, so we will enable it here.