Some updates to Lighthouse book (#6995)

* #6447


  - Move some deprecated pages to a new section under `Archived`

- Remove fallback log in mev as the log will not be present after VC using `/eth/v3/validator/blocks` endpoint by default
- Add warning against using Btrfs file system (thank you @ChosunOne for the report)
- Add data shared by @mcdee  on tree states API queries time
- Rename partial withdrawals to validator sweep to differentiate it from the upcoming execution layer partial withdrawals
- Update NAT API response
- Update docs on IPv6

- Rename .md files to follow a standard prefix section name, e.g., installation_*.md, advanced_*.md
- Standardise .md files using underscore `_` instead of hyphen `-` to be consistent with other files naming conventions.

book/src/installation_cross_compiling.md

@@ -0,0 +1,43 @@
+# Cross-compiling
+
+Lighthouse supports cross-compiling, allowing users to run a binary on one
+platform (e.g., `aarch64`) that was compiled on another platform (e.g.,
+`x86_64`).
+
+## Instructions
+
+Cross-compiling requires [`Docker`](https://docs.docker.com/engine/install/),
+[`rustembedded/cross`](https://github.com/rust-embedded/cross) and for the
+current user to be in the `docker` group.
+
+The binaries will be created in the `target/` directory of the Lighthouse
+project.
+
+### Targets
+
+The `Makefile` in the project contains two targets for cross-compiling:
+
+- `build-x86_64`: builds an optimized version for x86_64 processors (suitable for most users).
+- `build-aarch64`: builds an optimized version for 64-bit ARM processors (suitable for Raspberry Pi 4).
+
+### Example
+
+```bash
+cd lighthouse
+make build-aarch64
+```
+
+The `lighthouse` binary will be compiled inside a Docker container and placed
+in `lighthouse/target/aarch64-unknown-linux-gnu/release`.
+
+## Feature Flags
+
+When using the makefile the set of features used for building can be controlled with
+the environment variable `CROSS_FEATURES`. See [Feature
+ Flags](./installation_source.md#feature-flags) for available features.
+
+## Compilation Profiles
+
+When using the makefile the build profile can be controlled with the environment variable
+`CROSS_PROFILE`. See [Compilation Profiles](./installation_source.md#compilation-profiles) for
+available profiles.