docs(angular): add common pipes content (#6497)

src/data/roadmaps/angular/content/common-pipes@i2taHzQ5KLHjkkpbH4Ytd.md

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-# Common Pipes
+# Common Pipes
+
+Angular provides built-in pipes for typical data transformations, including transformations for internationalization (i18n), which use locale information to format data. The following are commonly used built-in pipes for data formatting:
+
+- DatePipe: Formats a date value according to locale rules.
+- UpperCasePipe: Transforms text to all upper case.
+- LowerCasePipe: Transforms text to all lower case.
+- CurrencyPipe: Transforms a number to a currency string, formatted according to locale rules.
+- DecimalPipe: Transforms a number into a string with a decimal point, formatted according to locale rules.
+- PercentPipe: Transforms a number to a percentage string, formatted according to locale rules.
+- AsyncPipe: Subscribe and unsubscribe to an asynchronous source such as an observable.
+- JsonPipe: Display a component object property to the screen as JSON for debugging.
+
+Visit the following resources to learn more:
+
+- [@official@Angular Official Docs - Pipes](https://angular.dev/guide/pipes)
+- [@article@Pipes in Angular](https://medium.com/@aqeelabbas3972/pipes-in-angular-6a871589299d)