docs: enable documentation build and remove redundant Draft meta

- Set draft = false in make.jl to enable @example block execution
- Remove redundant @meta Draft = false from manual-macro-free.md
  (draft mode is now controlled globally by make.jl)

Author: ocots

docs/make.jl

@@ -153,7 +153,7 @@ cp(
 Draft = false
 ```
 =#
-draft = true  # Draft mode: if true, @example blocks in markdown are not executed
+draft = false  # Draft mode: if true, @example blocks in markdown are not executed
 
 # ═══════════════════════════════════════════════════════════════════════════════
 # Load extensions

docs/src/manual-macro-free.md

@@ -1,9 +1,5 @@
 # [Functional API (macro-free)](@id manual-macro-free)
 
-```@meta
-Draft = false
-```
-
 The [`@def`](@ref manual-abstract-syntax) macro provides a concise DSL to define optimal control problems. An alternative is the **functional API**, which builds the same problem step by step using plain Julia functions. This approach is useful when:
 
 - generating problems **programmatically** from parameters, data, or loops,