Introduce flowd.build.toml

[ERnsTL]

Task 1 — Introduce flowd.build.toml

Objective

Create a build configuration file that defines which FBP components are compiled into the runtime.

Requirements

1. Create a file:

flowd.build.toml

2. Define the following structure:

[[components]]
name = "Repeat"
crate = "repeat_component"
struct = "RepeatComponent"
log_ignore = ["hyper::proto::h1"]

[[components]]
name = "Drop"
crate = "drop_component"
struct = "DropComponent"
log_ignore = []

3. Fields:

Field	Type	Required	Description
name	string	yes	Name used in graph definitions
crate	string	yes	Rust crate name
struct	string	yes	Struct implementing the component
log_ignore	array[string]	no	Log prefixes to suppress

Acceptance Criteria

• File parses correctly via toml crate.
• Duplicate name entries cause build failure.

[ERnsTL]

Implemented flowd.build.toml and wired parsing through toml in build.rs. Duplicate component names now fail the build via validation.
Note: config uses [components] + [[components.entry]] (not [[components]]) as the implemented schema.