Bug 1919574 - CLI tool to generate the android/ios directories

I was going to update the adding a new component docs, but while I was
reading them that the best way to simplify them would be to automate the
process.

* Added the `cargo start-bindings` tool.
* Removed the "Converting an existing Component to UniFFI" HOWTO.  I
  believe that all our existing components have been converted so
  there's no need to keep updating this.
* Added a section about dependencies and the build.gradle file.
* Removed the `pub use` items from the megazord lib.rs files.  I don't
  believe they were needed.

.cargo/config.toml

@@ -8,3 +8,4 @@ suggest-bench = ["bench", "-p", "suggest", "--features", "benchmark_api"]
 suggest-debug-ingestion-sizes = ["run", "-p", "suggest", "--bin", "debug_ingestion_sizes", "--features", "benchmark_api"]
 relevancy = ["run", "-p", "examples-relevancy-cli", "--"]
 suggest = ["run", "-p", "examples-suggest-cli", "--"]
+start-bindings = ["run", "-p", "start-bindings", "--"]

CHANGELOG.md

@@ -4,6 +4,13 @@
 
 # v132.0 (_2024-09-30_)
 
+## ✨ What's New ✨
+
+### General
+
+- Simplified the process of adding a new component by adding a tool that can autogenerate the
+  initial UniFFI/bindings code.
+
 ## 🦊 What's Changed 🦊
 
 ### Glean

Cargo.toml

@@ -49,6 +49,7 @@ members = [
     "megazords/ios-rust/focus",
     "tools/protobuf-gen",
     "tools/embedded-uniffi-bindgen",
+    "tools/start-bindings",
     "automation/swift-components-docs",
 
     "examples/*/",

DEPENDENCIES.md

@@ -506,7 +506,7 @@ The following text applies to code linked from these dependencies:
 [iana-time-zone](https://github.com/strawlab/iana-time-zone),
 [id-arena](https://github.com/fitzgen/id-arena),
 [idna](https://github.com/servo/rust-url/),
-[indexmap](https://github.com/bluss/indexmap),
+[indexmap](https://github.com/indexmap-rs/indexmap),
 [io-lifetimes](https://github.com/sunfishcode/io-lifetimes),
 [ipnet](https://github.com/krisprice/ipnet),
 [itertools](https://github.com/rust-itertools/itertools),