Add LocationIQ as supported map provider (#1293)

- Add LocationIQ access token field to settings and export modals
  - Include LocationIQ Streets style in gallery
  - Support automatic token replacement for LocationIQ URLs
  - Add LocationIQ tileset configuration
  - Include translations for all supported languages

## Launch Checklist
 - [x] Briefly describe the changes in this PR.
 - [x] Write tests for all new functionality.
 - [x] Add an entry to `CHANGELOG.md` under the `## main` section.

src/libs/field-spec-additional.ts

@@ -20,6 +20,12 @@ const spec = (t: TFunction) => ({
       docUrl: "https://docs.stadiamaps.com/authentication/",
       docUrlLinkText: t("Learn More")
     },
+    locationiq_access_token: {
+      label: t("LocationIQ Access Token"),
+      doc: t("Public access token for LocationIQ services."),
+      docUrl: "https://docs.locationiq.com/docs/maps",
+      docUrlLinkText: t("Learn More")
+    },
     style_renderer: {
       label: t("Style Renderer"),
       doc: t("Choose the default Maputnik renderer for this style.")

src/libs/style.ts

@@ -79,6 +79,9 @@ function replaceSourceAccessToken(mapStyle: StyleSpecification, sourceName: stri
     // so we need to check the source URL.
     authSourceName = "stadia"
   }
+  else if (("url" in source) && source.url?.match(/\.locationiq\.com/)) {
+    authSourceName = "locationiq"
+  }
 
   const accessToken = getAccessToken(authSourceName, mapStyle, opts)
 
@@ -138,6 +141,7 @@ function stripAccessTokens(mapStyle: StyleSpecification) {
   delete changedMetadata['maputnik:openmaptiles_access_token'];
   delete changedMetadata['maputnik:thunderforest_access_token'];
   delete changedMetadata['maputnik:stadia_access_token'];
+  delete changedMetadata['maputnik:locationiq_access_token'];
   return {
     ...mapStyle,
     metadata: changedMetadata