Add the first licensed Hollywood reference board

docs/screens/refs/hollywood/README.md

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+# Hollywood Boulevard reference board
+
+Licensed photographs of the real El Capitan Entertainment Centre block at 6840 Hollywood
+Boulevard, used as evidence for the venue's proportions, signage and staging. They are
+development reference only and are **not** shipped with the game.
+
+Provenance, licences and the decisions these photos informed are in
+[`SIDECAR.md`](SIDECAR.md). The rules for this folder are in
+[`../README.md`](../README.md); generated art-direction frames live in
+[`../../concepts/hollywood_boulevard/`](../../concepts/hollywood_boulevard/README.md).
+
+| Photo | What it is evidence for |
+| --- | --- |
+| ![El Capitan facade, day, with three vertical banners](el-capitan-facade-day-wikimedia-2009-10-27.jpg) | **Facade, day.** Six Ionic columns, the Masonic parapet motto, banner count and size, stone joints, window rhythm and the marquee overhang. |
+| ![El Capitan theatre blade sign and the Masonic temple frontage from the street](el-capitan-theatre-blade-sign-day-wikimedia-2008-10.jpg) | **Block relationship.** The theatre's vertical blade sign next to the temple frontage, the setback, kerb line and street width. |
+| ![The Masonic Temple in 1922, before the theatre complex](masonic-temple-historic-pd-1922.jpg) | **Original elevation.** The 1922 facade with the motto band, cornice and column order, before later signage and tenants. |
+| ![Ovation Hollywood across the boulevard](ovation-hollywood-across-street-pd-2006-12-28.jpg) | **Across the street.** The Ovation Hollywood frontage, its height relative to the temple, and the plaza opening on Highland. |
+| ![Red carpet premiere staging with barriers along the sidewalk](premiere-staging-street-day-wikimedia-2006-02-12.jpg) | **Premiere staging.** Red carpet run, crowd barriers, tent line and the way the sidewalk narrows for an event. |
+
+## Gaps to fill
+
+- A night photograph of the facade and blade sign (lighting reference; the current night
+  evidence is the generated concept frame).
+- A close-up of the Walk of Fame terrazzo and of a star medallion for material scale.
+- A sidewalk-level shot of the steps and door recess for the entrance approach.
+- A licensed photo of the east retail neighbours (Jimmy Kimmel / El Capitan Theatre block
+  neighbours) for the facade rhythm beyond the hero building.
+
+Add new files with the naming convention in [`../README.md`](../README.md) and list them in the
+sidecar in the same commit.