Populate API file

The API file seems fairly populated, but TBH I didn't evaluate whether it reflected the current state of the D8+ module.

https://git.drupalcode.org/project/pwa/-/blob/8.x-1.x/pwa.api.php

As of #8

As of #8

Currently listed in .api.php:

hook_pwa_cache_urls_alter(&$cacheUrls, CacheableMetadata &$cacheableMetadata) {
hook_pwa_exclude_urls_alter(&$excludeUrls, CacheableMetadata &$cacheableMetadata) {
hook_pwa_cache_urls_assets_alter(&$resources) {
hook_pwa_cache_urls_assets_page_alter(&$resources, $page, $xpath) {
hook_pwa_manifest_alter(&$manifestData) {

Used alter hooks as of 2.x-rc2:

Module:
- pwa_install_path
- pwa_cache_urls_assets_page
- pwa_cache_urls_assets
- pwa_cache_urls
- pwa_exclude_urls
- pwa_replace_placeholders
- pwa_manifest

Missing in .api.php:
- hook_pwa_install_path_alter
- hook_pwa_replace_placeholders_alter

Theme alter hooks:
- pwa_cache_urls_assets_page
- pwa_manifest

Function definitions:

\Drupal::moduleHandler()->alter('pwa_install_path', $installPath);

$this->moduleHandler->alter('pwa_replace_placeholders', $replace);

Therefor api additions:

function hook_pwa_install_path_alter(&$installPath) {

function hook_pwa_replace_placeholders_alter(&$replace) {

No idea what these do. Also: use TypeHints?