Move examples to fission/examples; vendor minimal CI fixtures (#454)

* Move examples to fission/examples; vendor minimal CI fixtures

Runnable examples now live canonically in the fission/examples repo.
This removes the duplicated examples/ directory from every environment.

To keep the environment test suites self-contained, the minimal function
code each test needs is vendored under that environment's test dir as
tests/fixtures/ (or test/fixtures/), and the test scripts are repointed:
- binary, python, python-fastapi, rust, jvm, tensorflow-serving
- jvm: adjusted the install-fission-java-core.sh mount depth for the new
  fixture path

README "ready-to-run examples" links now point at github.com/fission/examples.
Updated CLAUDE.md and the release-process note accordingly.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

* Fix CI: repoint e2e tests and catalog links after examples removal

The first pass missed the e2e suites (test_go_env.sh, test_rust_env.sh,
test_binary_env.sh, test_dotnet8_env.sh) because they `cd $ROOT/<env>/examples`
without a trailing slash. They now build from vendored fixtures:
- go/tests/fixtures (hello.go + module-example)
- rust/tests/fixtures (hello.rs + project-example)
- binary/test/fixtures (hello.sh + module-example, alongside echo.sh)
- dotnet8/tests/fixtures (HelloWorld + MultiFileExample)

Also repoint the `examples` URL in every envconfig.json to fission/examples
(fixing two pre-existing copy-paste bugs: python-fastapi pointed at python,
php7 pointed at perl) and regenerate environments.json.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: sanketsudake

.claude/resources/release-process.md

@@ -1,7 +1,7 @@
 [
   {
     "builder": "binary-builder",
-    "examples": "https://github.com/fission/environments/tree/master/binary/examples",
+    "examples": "https://github.com/fission/examples/tree/main/miscellaneous/binary",
     "icon": "./logo/full_colored_dark.svg",
     "image": "binary-env",
     "keywords": [],

CLAUDE.md

@@ -30,7 +30,7 @@ echo "--Healthz"
 curl -i -f -X GET "$SERVER"/healthz
 
 echo "-- Specializing"
-curl -i -f -XPOST "$SERVER"/v2/specialize -H 'Content-Type: application/json' -d '{"filepath": "./examples/echo.sh"}'
+curl -i -f -XPOST "$SERVER"/v2/specialize -H 'Content-Type: application/json' -d '{"filepath": "./test/fixtures/echo.sh"}'
 
 echo "-- Running"
 curl -i -f -XPOST "$SERVER" -d 'Echoooooo!'