Clean up last few TODO links

This cleans up the last few links that were just waiting to be filled
in, plus a TODO block to embed a file in the multiversion tutorial.

Author: DirectXMan12

docs/book/src/cronjob-tutorial/testdata/emptymain.go

@@ -58,9 +58,11 @@ At this point, our main function is fairly simple:
 
 - We set up some basic flags for metrics.
 
-- We instantiate a [*manager*](../TODO.md), which keeps track of running all of
-our controllers, as well as setting up shared caches and clients to the API
-server (notice we tell the manager about our Scheme).
+- We instantiate a
+[*manager*](https://godoc.org/sigs.k8s.io/controller-runtime/pkg/manager#Manager),
+which keeps track of running all of our controllers, as well as setting up
+shared caches and clients to the API server (notice we tell the manager about
+our Scheme).
 
 - We run our manager, which in turn runs all of our controllers and webhooks.
 The manager is set up to run until it receives a graceful shutdown signal.

docs/book/src/cronjob-tutorial/testdata/project/api/v1/cronjob_webhook.go

@@ -50,9 +50,9 @@ func (r *CronJob) SetupWebhookWithManager(mgr ctrl.Manager) error {
 
 /*
 Notice that we use kubebuilder markers to generate webhook manifests.
-This markers is responsible for generating a mutating webhook manifest.
+This marker is responsible for generating a mutating webhook manifest.
 
-The meaning of each marker can be found [here](../TODO.md).
+The meaning of each marker can be found [here](/reference/markers/webhook.md).
 */
 
 // +kubebuilder:webhook:path=/mutate-batch-tutorial-kubebuilder-io-v1-cronjob,mutating=true,failurePolicy=fail,groups=batch.tutorial.kubebuilder.io,resources=cronjobs,verbs=create;update,versions=v1,name=mcronjob.kb.io
@@ -87,10 +87,7 @@ func (r *CronJob) Default() {
 }
 
 /*
-Notice that we use kubebuilder markers to generate webhook manifests.
-This markers is responsible for generating a validating webhook manifest.
-
-The meaning of each marker can be found [here](../TODO.md).
+This marker is responsible for generating a validating webhook manifest.
 */
 
 // +kubebuilder:webhook:path=/validate-batch-tutorial-kubebuilder-io-v1-cronjob,mutating=false,failurePolicy=fail,groups=batch.tutorial.kubebuilder.io,resources=cronjobs,verbs=create;update,versions=v1,name=vcronjob.kb.io
@@ -156,7 +153,7 @@ You can find kubebuilder validation markers (prefixed
 with `// +kubebuilder:validation`) in the [API](api-design.md)
 You can find all of the kubebuilder supported markers for
 declaring validation by running `controller-gen crd -w`,
-or [here](../TODO.md).
+or [here](/reference/markers/crd-validation.md).
 */
 
 func (r *CronJob) validateCronJobSpec() *field.Error {

docs/book/src/multiversion-tutorial/api-implementation.md

@@ -154,7 +154,7 @@ Let's take a quick look at the `api/v1/disk_webhook.go` file.
 
 If you look at `main.go`, you will notice the following snippet that invokes the
 SetupWebhook method.
-```Go
+```go
 	.....
 
 	if err = (&infrav1.Disk{}).SetupWebhookWithManager(mgr); err != nil {
@@ -176,7 +176,14 @@ CRD_OPTIONS ?= "crd:trivialVersions=false"
 ```
 
 Run `make manifests` to ensure that CRD manifests gets generated under `config/crd/bases/` directory.
-[TODO](../TODO.md) embed a compressed form of the generated CRD `testdata/project/config/crd`
+
+<details><summary>`infra.kubebuilder.io_disks.yaml`: the generated CRD YAML</summary>
+
+```yaml
+{{#include ./testdata/project/config/crd/bases/infra.kubebuilder.io_disks.yaml}}
+```
+
+</details>
 
 ### Manifests Generation