Migrate 25 crates to monorepo.

pin-project
pin-project-internal
pin-project-lite
pkcs1
pkcs8
plotters-backend
plotters-svg
ppv-lite86
predicates-core
predicates-tree
prettyplease
proc-macro2
rand
rand_chacha
rand_core
rand_xorshift
rayon
rayon-core
regex
regex-syntax
rusqlite
rustc-demangle
rustc-hash
rustversion
scopeguard

Bug: 339424309
Test: treehugger
Change-Id: I4e678b4e2440f3fce9b421ae73de01d376afdf38
diff --git a/crates/predicates-tree/cargo_embargo.json b/crates/predicates-tree/cargo_embargo.json
new file mode 100644
index 0000000..9a0a579
--- /dev/null
+++ b/crates/predicates-tree/cargo_embargo.json
@@ -0,0 +1,3 @@
+{
+  "tests": true
+}