Consolidate project documentation and attribution

Add public-alias credits and a tested in-game credits page, centralize project guidance and asset provenance, import the complete authored fur channel maps, and keep starter-island collision synchronized with imported props.

docs/README.md

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+# NETfishing documentation
+
+This directory is the single home for maintained project documentation.
+Start here instead of searching feature, asset, world, or script directories
+for local README files.
+
+## Authoritative references
+
+- [`DEVELOPMENT.md`](DEVELOPMENT.md): architecture, engineering decisions,
+  content and balance policy, authoring guidance, and validation.
+- [`ATTRIBUTION.md`](ATTRIBUTION.md): ownership, credits, licensing map,
+  third-party notices, asset provenance, and redistribution requirements.
+- [`PORTMASTER.md`](PORTMASTER.md): PortMaster packaging, installation,
+  controller mapping, performance behavior, and hardware release checks.
+- [`README-PLAYTEST.txt`](README-PLAYTEST.txt): the player-facing README staged
+  into desktop playtest packages.
+
+## Related repositories
+
+- [Discovery service API](https://forge.makearmy.io/woofmeow/netfishing-discovery-server/src/branch/main/docs/API.md)
+  stays with the service implementation and defines its versioned HTTP
+  contract.
+- [Dedicated-server packaging](https://forge.makearmy.io/woofmeow/netfishing-dedicated-server/src/branch/main/README.md)
+  stays with its installer and update scripts. It consumes this repository's
+  attribution and legal notices from the exact pinned game commit instead of
+  maintaining copies.
+
+Those code-coupled references remain in their own repositories. Game-wide
+architecture, authoring, licensing, credits, and provenance are not duplicated
+there.
+
+Exact runtime values and behavior remain authoritative in source code, scenes,
+and resources. These documents describe boundaries, policy, and maintenance
+procedures; they should not duplicate changing constants or inventories that
+can be derived reliably from the project.
+
+## Files intentionally kept at the repository root
+
+The following are entry points or governing legal documents rather than
+general project documentation, so they remain at conventional root paths:
+
+- `README.md`
+- `CONTRIBUTING.md`
+- `LICENSE`
+- `ASSET-LICENSE.md`
+- `TRADEMARKS.md`
+- `CONTRIBUTOR-TERMS.md`
+
+Third-party font license texts stay beside their font files under `ui/fonts/`
+so the licensed files and their original notices cannot drift apart. Build
+scripts collect those legal files and the authoritative attribution record
+when assembling releases.
+
+## Maintenance rule
+
+Do not add feature-specific README files elsewhere in the repository. Add or
+update the appropriate reference above and link to its heading when source
+comments need more context. Player-facing package instructions belong only in
+`README-PLAYTEST.txt`; source and scripts remain authoritative for command-line
+usage.