Add new examples to kompose (#1803)

#### What type of PR is this?

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Add one of the following kinds:
/kind bug
/kind documentation
/kind feature
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/kind cleanup

#### What this PR does / why we need it:

Fixes the current broken examples by:

* Removing all the old incompatible ones (we do not really support v3
  anymore or v2... since switching libraries)
* Uses quay.io/kompose/web as our front end example which is a fork of
  the guestbook-go kubernetes examples

#### Which issue(s) this PR fixes:
<!--
*Automatically closes linked issue when PR is merged.
Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
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Closes https://github.com/kubernetes/kompose/issues/1757

#### Special notes for your reviewer:

Test using docker-compose (you'll see it come up!), then try with
kompose :)

Signed-off-by: Charlie Drage <charlie@charliedrage.com>

examples/web/vendor/modules.txt

@@ -0,0 +1,15 @@
+# github.com/codegangsta/negroni v1.0.0
+## explicit
+github.com/codegangsta/negroni
+# github.com/gomodule/redigo v1.8.9
+## explicit; go 1.16
+github.com/gomodule/redigo/redis
+# github.com/gorilla/mux v1.8.1
+## explicit; go 1.20
+github.com/gorilla/mux
+# github.com/xyproto/pinterface v1.5.3
+## explicit; go 1.8
+github.com/xyproto/pinterface
+# github.com/xyproto/simpleredis/v2 v2.6.5
+## explicit; go 1.17
+github.com/xyproto/simpleredis/v2