Prefix explorer CI with explorer-

Desktop's GitHub workflows are already prefixed `desktop-`. With both
projects in one repo, the prefix shows which project a workflow or
Buildkite step belongs to.

.github/workflows/explorer-build.yml

@@ -1,4 +1,4 @@
-name: check-build
+name: explorer-build
 on:
   push:
   workflow_dispatch:
@@ -7,7 +7,7 @@ env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
 
 jobs:
-  check-build:
+  build:
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:

.github/workflows/explorer-check.yml

@@ -1,4 +1,4 @@
-name: check
+name: explorer-check
 on:
   push:
   workflow_dispatch:

.github/workflows/explorer-e2e.yml

@@ -1,4 +1,4 @@
-name: check-e2e
+name: explorer-e2e
 on:
   push:
   workflow_dispatch:
@@ -7,7 +7,7 @@ env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
 
 jobs:
-  check-e2e:
+  e2e:
     timeout-minutes: 30
     runs-on: ubuntu-latest
     steps:

.github/workflows/explorer-http-client-unit-test.yml

@@ -1,4 +1,4 @@
-name: check-http-client-unit-test
+name: explorer-http-client-unit-test
 on:
   push:
   workflow_dispatch:
@@ -7,7 +7,7 @@ env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
 
 jobs:
-  check-http-client-unit-test:
+  http-client-unit-test:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout

.github/workflows/explorer-rust.yml

@@ -1,4 +1,4 @@
-name: check-rust
+name: explorer-rust
 on:
   push:
   workflow_dispatch:

.github/workflows/explorer-unit-test.yml

@@ -1,4 +1,4 @@
-name: check-unit-test
+name: explorer-unit-test
 on:
   push:
   workflow_dispatch:
@@ -7,7 +7,7 @@ env:
   FORCE_JAVASCRIPT_ACTIONS_TO_NODE24: true
 
 jobs:
-  check-unit-test:
+  unit-test:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout

.github/workflows/explorer-visual.yml

@@ -1,4 +1,4 @@
-name: check-visual
+name: explorer-visual
 on:
   push:
   workflow_dispatch: