**Pipes Sample Code**
Migrated all sample code in the `examples/pipes` folder. Did not touch the pipes in the ToH or Testing folders.
>The existing, complex discussion of the `CurrencyPipe` within `pipes-transform-data.md` cried out for a new `concurrency-formatting.component` example`.
**Extracted "pipe precedence" into its own page**
The topic had been extracted from `pipe.md` and tacked on to the bottom of the `pipes-overview.md` page.
It's an advanced and somewhat obscure topic that doesn't belong in the overview. Rather than throw it away, I created a new `pipe-precedence.md` page and added it to the bottom of the pipes section navigation.
I also tried to improve both the guide text and the companion component, `precedence.component`.
**How to create a pipe is missing**
The readers are told they can create their own pipes in several places throughout the docs. But there are no links and you can't navigate to a page that covers the topic. This is a serious omission!
The topic is introduced in the `pipes-custom-data-trans.md` page (extracted verbatim from `pipes.md`). But you can't navigate to this page and their are no links to it.
TODO: restore this page and add it to the left-nav.
**Change `pipes.md` references to `pipe-overview.md`**
The original, kitchen-sink page, `pipes.md`, was disconnected from navigation long ago, in favor of multiple pages such as `pipe-overview.md`. The page is still in the AIO documentation and can be found by searching or by links from 3rd party documenters. Landing on that page hides the left-nav.
In this commit, we treat `pipes.md` as deprecated (which it seems to be). Therefore, this commit retargets previous `pipes.md` references to `pipe-overview.md`.
>The `change-detection-slow-computations.md` is the exception. It refers to "pure pipes", a subject not covered in the current pipe documentation. That reference is retargeted to `api/core/Pipe#pure`.
Certain code files are only referenced in `pipe.md`. They still work and are displayed in the overall pipes code sample as before. Now they are marked with deprecation comments for future treatment or removal.
For consistency, certain sections of `pipes.md` were replaced by the contents of the corresponding current pages.
PR Close#51333
docs(docs-infra): fix wrong links in first-app-lesson-14.md
in first-app-lesson-14.md, the links to starting code point to the wrong lesson 06 instead of lesson 13 and the links to completed code point to lesson 07 instead of lesson 14
PR Close#51097
docs(docs-infra): fix wrong links in first-app-lesson-13.md
in first-app-lesson-13.md, the links to starting code point to the wrong lesson 13 instead of lesson 12 and the links to completed code point to lesson 14 instead of lesson 13
PR Close#51094
docs(docs-infra): Typo in first-app-lesson-04.md
fix an error in the description of Step 3 paragraph 5:
instead of
"If the data didn't satisfy the description of the IF the IDE has enough information to give us helpful errors."
the correct text is now
"If the data didn't satisfy the description of the INTERFACE, the IDE has enough information to give us helpful errors."
PR Close#51021
Unlike other steps of the tutorial, Lesson 3, Step 1 of the tutorial does not specify that the user should be in the project directory before creating the new component.
PR Close#50849
Add info about importing RouterLink and RouterOutlet.
The existing document results in an error. The error indicates that the anchor element doesn't have the binding property for routerLink.
The corresponding module (RouterModule) should be imported in the component template.
Add description for RouterModule in housing-location component
The description is added to fix the issue with the anchor element tag binding.
PR Close#50348
At this point in the tutorial we are still talking about the `getHeroes()` method. Corrected the method name to reflect that since the final piece of code within this section is for `getHeroes()`
PR Close#50479
Lesson 11 proposes to add styles to the `details.component.css` file, which isn't created with the current command. The change brings the component creation to consistency with the other components in the first app tutorial.
PR Close#50390
Adds the content for lesson 13, fixes some code inconsistencies for the services code in the examples, and adds this lesson to the navigation.
PR Close#49980
Updated the content for the tutorial lesson 10, added doc regions to the code and updated the service. Also added a placeholder for lesson 11.
PR Close#49980
