AUTH-5403 added access custom pages

[russellkerns]

Description

This PR will add the ability to CRUD Access custom pages

Has your change been tested?

Via units tests

Screenshots (if appropriate):

Types of changes

What sort of change does your code introduce/modify?

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.
• This change is using publicly documented in cloudflare/api-schemas
  and relies on stable APIs.

[github-actions]

changelog detected ✅

[jacobbednarz]

similar to List we should prefix this with Get to align with the experimental client conventions.

Suggested change

	func (api *API) AccessCustomPage(ctx context.Context, rc *ResourceContainer, customPageID string) (AccessCustomPage, error) {
	func (api *API) GetAccessCustomPage(ctx context.Context, rc *ResourceContainer, customPageID string) (AccessCustomPage, error) {

[codecov-commenter]

Codecov Report

Merging #1343 (bcc4eb4) into master (b9ac804) will increase coverage by 0.15%.
Report is 79 commits behind head on master.
The diff coverage is 58.26%.

@@            Coverage Diff             @@
##           master    #1343      +/-   ##
==========================================
+ Coverage   48.33%   48.49%   +0.15%     
==========================================
  Files         133      135       +2     
  Lines       13023    13203     +180     
==========================================
+ Hits         6295     6403     +108     
- Misses       5201     5248      +47     
- Partials     1527     1552      +25     

Files Changed	Coverage Δ
access_application.go	72.72% <ø> (ø)
access_organization.go	53.84% <ø> (ø)
device_posture_rule.go	61.80% <ø> (ø)
load_balancing.go	59.40% <ø> (ø)
teams_accounts.go	53.84% <ø> (ø)
regional_tiered_cache.go	43.75% <43.75%> (ø)
logpush.go	51.81% <46.15%> (-0.30%)	⬇️
images.go	44.70% <47.82%> (-0.12%)	⬇️
access_custom_page.go	48.27% <48.27%> (ø)
rulesets.go	30.03% <52.17%> (-4.61%)	⬇️
... and 6 more

[github-actions]

This functionality has been released in v0.74.0.

For further feature requests or bug reports with this functionality, please create a new GitHub issue following the template. Thank you!